US2114393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Greaseproof impregnated article and method of preparing
Assignee: Hercules Powder Co
•
Filing: 1936-04-03
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Granted: 1938-04-19
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Expires: 1956-04-03
Abstract
No abstract record available.
Inventors
- 👤 Fred H Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:26
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/62; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2262
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) | 1941-04-18 | 1941-10-18 | 1942-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-04-18 | 1945-10-18 | 1946-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-04-18 | 1949-10-18 | 1950-04-19 | $7700.00 | Window Closed / Lapsed |