Patent US4023185A successfully refreshed from Google Patents.
Patent US2067862A successfully refreshed from Google Patents.
US2067862A
Expired / Lapsed
US
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Synthetic resin and method of producing
Assignee: Hercules Powder Co
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Filing: 1934-12-01
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Granted: 1937-01-12
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Expires: 1954-12-01
Abstract
No abstract record available.
Inventors
- 👤 Alfred L Rummelsburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:49
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/46; C08G63/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-01-12 | 1940-07-13 | 1941-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-01-12 | 1944-07-13 | 1945-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-01-12 | 1948-07-13 | 1949-01-12 | $7700.00 | Window Closed / Lapsed |