US2472437A
Expired / Lapsed
US
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Dehydroabietic acid derivatives
Assignee: Hercules Powder Co
•
Filing: 1947-02-26
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Granted: 1949-06-07
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Expires: 1967-02-26
Abstract
No abstract record available.
Inventors
- 👤 Yolanda T Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:52
CPC Classifications
C; C07; C07C; C07C62/00; C07C62/30; C07C62/32; C07C61/00; C07C61/16; C07C61/40; C10; C10M; C10M1/00; C10M1/08; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/26; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2219/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2084213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |