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US3476795A
Expired / Lapsed
US
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Hydroxyesters of bark phenolic acids
Assignee: Weyerhaeuser Co
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Filing: 1965-10-22
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Granted: 1969-11-04
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 George Graham Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:05
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6492; C08G18/48; C08G18/487; C08G18/4879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2845450A
Cited
US2890231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |