DAVID JOHN O'CALLAGHAN
Pilots at 114 St, Sumner, WA
License number
Washington A4238288
Issued Date
Mar 2017
Expiration Date
Mar 2019
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
18023 114Th St E, Sumner, WA 98391
Professional information
Internally Curing Cement Based Materials
US Patent:
2013000, Jan 3, 2013
Filed:
Jun 13, 2012
Appl. No.:
13/495646
Inventors:
S. Ananda Weerawarna - Seattle WA, US
David J. O'Callaghan - Bonney Lake WA, US
David J. O'Callaghan - Bonney Lake WA, US
Assignee:
WEYERHAEUSER NR COMPANY - Federal Way WA
International Classification:
C04B 16/02
US Classification:
106805
Abstract:
A method of curing cementitious material comprising added a fibrillated carboxyalkyl cellulose, cellulose alkylsulfonic acid, phosphorylated cellulose or sulfated cellulose having a degree of substitution of 0.01 to 0.45 to the material during mixing. The fibrillated carboxyalkyl cellulose, cellulose alkylsulfonic acid, phosphorylated cellulose or sulfated cellulose may also include bleached or partially bleached wood pulp fiber. The fibrillated carboxyalkyl cellulose, cellulose alkylsulfonic acid, phosphorylated cellulose or sulfated cellulose has a substituent content of from 10 to 150 meq/100 g cellulose fiber. The fibrillated carboxyalkyl cellulose, cellulose alkylsulfonic acid, phosphorylated cellulose or sulfated cellulose is 0.1 to 5% by weight of the dry weight of the cementitious material. The structure produced by the method. The autogenous shrinkage of the cementitious material is reduced.
Method Of Making A Fiber Cement Board With Improved Properties And The Product
US Patent:
8273174, Sep 25, 2012
Filed:
Dec 31, 2008
Appl. No.:
12/347501
Inventors:
Sherry L Thomson - Normandy Park WA, US
David J O'Callaghan - Bonney Lake WA, US
John A Westland - Auburn WA, US
Bing Su - Federal Way WA, US
David J O'Callaghan - Bonney Lake WA, US
John A Westland - Auburn WA, US
Bing Su - Federal Way WA, US
Assignee:
Wyerhaeuser NR Company - Federal Way WA
International Classification:
C04B 2/00, C04B 7/14, C04B 14/00, C04B 28/10, C04B 28/14, C04B 5/00, C04B 28/08, C04B 9/00, C04B 11/00, C04B 16/00, C04B 24/00, C04B 7/00, C04B 16/02, C04B 18/06, C04B 12/00, C04B 24/14, C04B 24/10
US Classification:
106805, 106618, 106619, 106686, 106705, 106772, 106778, 106780, 106790, 106797
Abstract:
A cement product incorporating nanocrystalline cellulose and cellulose fiber throughout the product and a method of making the product.
Method Of Making A Fiber Cement Board With Improved Properties And The Product
US Patent:
8293003, Oct 23, 2012
Filed:
Aug 9, 2012
Appl. No.:
13/571234
Inventors:
Sherry L. Thomson - Normandy Park WA, US
David J. O'Callaghan - Bonney Lake WA, US
John A. Westland - Auburn WA, US
Bing Su - Federal Way WA, US
David J. O'Callaghan - Bonney Lake WA, US
John A. Westland - Auburn WA, US
Bing Su - Federal Way WA, US
Assignee:
Weyerhaeuser NR Company - Federal Way WA
International Classification:
C04B 2/00, C04B 7/14, C04B 14/00, C04B 28/10, C04B 28/14, C04B 5/00, C04B 28/08, C04B 9/00, C04B 11/00, C04B 16/00, C04B 24/00, C04B 7/00, C04B 16/02, C04B 18/06, C04B 12/00, C04B 24/14, C04B 24/10
US Classification:
106687, 106686, 106705, 106772, 106778, 106618, 106619, 106780, 106790, 106797
Abstract:
A cement product incorporating nanocrystalline cellulose and cellulose fiber throughout the product and a method of making the product.
Fiber Cement Board With Modified Fiber
US Patent:
8317914, Nov 27, 2012
Filed:
May 29, 2009
Appl. No.:
12/475206
Inventors:
Robert T Hamilton - Seattle WA, US
David J O'Callaghan - Bonney Lake WA, US
Hugh West - Seattle WA, US
David J O'Callaghan - Bonney Lake WA, US
Hugh West - Seattle WA, US
Assignee:
Weyerhaeuer NR Company - Federal Way WA
International Classification:
C04B 16/02
US Classification:
106644, 106730, 428703, 52344, 156 39
Abstract:
A building material product comprising a cementitious binder, an aggregate and cellulose reinforcing fibers wherein the cellulose reinforcing fibers have been treated with cationic or nonionic oil. The resulting fiber when included in a fiber cement composite results in improved deflection of the composite at peak loading as well as improved impact strength while maintaining overall board strength.
Internally Curing Cement Based Materials
US Patent:
8435345, May 7, 2013
Filed:
Sep 28, 2010
Appl. No.:
12/892239
Inventors:
John A. Westland - Auburn WA, US
David J. O'Callaghan - Bonney Lake WA, US
David J. O'Callaghan - Bonney Lake WA, US
Assignee:
Weyerhaeuser NR Company - Federal Way WA
International Classification:
C04B 28/14, C04B 40/00, C04B 9/04, D21F 11/00, D21H 11/00, D21H 13/00, D21H 15/00, D21H 17/00, D21H 19/00, D21H 21/00, D21H 23/00, D21H 25/00, D21C 9/00
US Classification:
106805, 106780, 106820, 162 9, 1621576, 162182
Abstract:
A method of curing cementitious material comprising added a carboxylated bleached wood pulp fiber to the material during mixing. The fiber has a carboxyl content of from 10 to 70 meq/100 g cellulose fiber. The fibers are 0. 1 to 5% by weight of the dry weight of the cementitious material. The structure produced by the method. The autogenous shrinkage of the cementitious material is reduced.
Fiber Cement Board With Modified Fiber
US Patent:
2010030, Dec 2, 2010
Filed:
May 29, 2009
Appl. No.:
12/475172
Inventors:
ROBERT T. HAMILTON - Seattle WA, US
David J. O'Callaghan - Bonney Lake WA, US
Hugh West - Seattle WA, US
David J. O'Callaghan - Bonney Lake WA, US
Hugh West - Seattle WA, US
Assignee:
WEYERHAEUSER NR COMPANY - Federal Way WA
International Classification:
C04B 16/02, C08K 7/02
US Classification:
106805, 524 4, 524 2
Abstract:
A building material product comprising a cementitious binder, an aggregate and cellulose reinforcing fibers wherein the cellulose reinforcing fibers have been treated with oil which is bound to the fiber by a retention aid. The resulting fiber when included in a fiber cement composite results in improved deflection of the composite at peak loading as well as improved impact strength while maintaining overall board strength.
Internally Curing Cement Based Materials
US Patent:
2013021, Aug 22, 2013
Filed:
Apr 5, 2013
Appl. No.:
13/857274
Inventors:
WEYERHAEUSER NR COMPANY - , US
David J. O'Callaghan - Bonney Lake WA, US
David J. O'Callaghan - Bonney Lake WA, US
Assignee:
WEYERHAEUSER NR COMPANY - Federal Way WA
International Classification:
C04B 7/02
US Classification:
106728
Abstract:
A method of curing cementitious material comprising added a carboxylated bleached wood pulp fiber to the material during mixing. The fiber has a carboxyl content of from 10 to 70 meq/100 g cellulose fiber. The fibers are 0.1 to 5% by weight of the dry weight of the cementitious material. The structure produced by the method. The autognous shrinkage of the cementitious material is reduced.