US2806009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in the vacuum dehydration of thermosetting resins prepared by the reaction of a phenol, an aldehyde, and substantially petroleum hydrocarbon-insoluble pine wood resin in aqueous medium
Assignee: Hercules Powder Co
•
Filing: 1954-12-30
•
Granted: 1957-09-10
•
Expires: 1974-12-30
Abstract
No abstract record available.
Inventors
- 👤 John R Lewis
- 👤 Kenneth O Blanchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:25
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28; C08G8/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN THE VACUUM DEHYDRATION OF A THERMOSETTING RESIN PREPARED BY THE REACTION OF A PHENOL, AN ALDEHYDE AND SUBSTANTIALLY PETROLEUM HYDROCARBON-INSOLUBLE PINE WOOD RESIN IN AQUEOUS MEDIUM, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE REACTION PRODUCT PRIOR TO DEHYDRATION AN AMOUNT OF FURFURAL EQUAL TO AT LEAST ABOUT 5% OF THE COMBINED WEIGHT OF PHENOL AND SUBSTANTIALLY PETROLEUM HYDROCARBON-INSOLUBLE PINE WOOD RESIN.
Claim 2
Dependent Claim
62 words
IN THE VACUUM DEHYDRATION OF A THERMOSETTING RESIN PREPARED BY THE REACTION OF A PHENOL, AN ALDEHYDE AND SUBSTANTIALLY PETROLEUM HYDROCARBON-INSOLUBLE PINE WOOD RESIN IN AQUEOUS MEDIUM, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE REACTION PRODUCT PRIOR TO DEHYDRATION AN AMOUNT OF FURFURAL EQUAL TO AT LEAST ABOUT 5% OF THE COMBINED WEIGHT OF PHENOL AND SUBSTANTIALLY PETROLEUM HYDROCARBON-INSOLUBLE PINE WOOD RESIN.
References Cited (Backward Citations)
US2193026A
Cited
US2566851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |