Patent US1908569A successfully refreshed from Google Patents.
US1908569A
Expired / Lapsed
US
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Impregnated material and method of impregnation
Assignee: Hercules Powder Co
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Filing: 1929-10-05
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Granted: 1933-05-09
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Expires: 1949-10-05
Abstract
No abstract record available.
Inventors
- 👤 Buren I Stoops
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:55
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0083
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) | 1936-05-08 | 1936-11-07 | 1937-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-05-08 | 1940-11-07 | 1941-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-05-08 | 1944-11-07 | 1945-05-09 | $7700.00 | Window Closed / Lapsed |