US2637366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral drive
Assignee: Atlas Powder Co
•
Filing: 1947-07-29
•
Granted: 1953-05-05
•
Expires: 1967-07-29
Abstract
No abstract record available.
Inventors
- 👤 Walder B Ashworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:44
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18544
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US220111A
Cited
US1738161A
Cited
US1740792A
Cited
US1952239A
Cited
US2215731A
Cited
US2125269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |