Patent WO1992015356A1 successfully refreshed from Google Patents.
US2405909A
Expired / Lapsed
US
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Method of producing threaded spiral tubes
Assignee: Hercules Powder Co
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Filing: 1942-08-22
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Granted: 1946-08-13
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Expires: 1962-08-22
Abstract
No abstract record available.
Inventors
- 👤 Roscoe B Smith
- 👤 Minor W Latimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:12
CPC Classifications
B; B65; B65H; B65H81/00; B65H81/06; B65H81/08; B31; B31C; B31C3/00; Y; Y10; Y10T; Y10T408/00; Y10T408/03
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) | 1949-08-12 | 1950-02-11 | 1950-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-08-12 | 1954-02-11 | 1954-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-08-12 | 1958-02-11 | 1958-08-13 | $7700.00 | Window Closed / Lapsed |