US2261985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous tube
Assignee: Hercules Powder Co
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Filing: 1940-01-11
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Granted: 1941-11-11
•
Expires: 1960-01-11
Abstract
No abstract record available.
Inventors
- 👤 Albert E Forster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:22
CPC Classifications
E; E21; E21B; E21B17/00; F; F16; F16L; F16L9/00
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) | 1944-11-10 | 1945-05-12 | 1945-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-11-10 | 1949-05-12 | 1949-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-11-10 | 1953-05-12 | 1953-11-11 | $7700.00 | Window Closed / Lapsed |