US2336159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing filaments
Assignee: Hercules Powder Co
•
Filing: 1940-09-25
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Granted: 1943-12-07
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Expires: 1960-09-25
Abstract
No abstract record available.
Inventors
- 👤 Leavitt N Bent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:15
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/25; B29C48/36; B29C48/395; B29C48/78; B29C48/80; B29C48/83; B29C48/832; D01D1/04; D01F; D01F2/00; D01F2/24; D01F2/28
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) | 1946-12-06 | 1947-06-07 | 1947-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-12-06 | 1951-06-07 | 1951-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-12-06 | 1955-06-07 | 1955-12-07 | $7700.00 | Window Closed / Lapsed |