US2903569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming spiral blades
Assignee: Kearney & Tracker Corp
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Filing: 1956-05-18
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Granted: 1959-09-08
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Expires: 1976-05-18
Abstract
No abstract record available.
Inventors
- 👤 Jacob M Davis
- 👤 Gordon H Hochmuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:53
CPC Classifications
B; B21; B21K; B21K5/00; B21K5/02; B21K5/04; B21J; B21J1/00; B21J1/06; B21J5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |