US2897889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen spline with direct frictional engagement means
Assignee: Individual
•
Filing: 1957-05-27
•
Granted: 1959-08-04
•
Expires: 1977-05-27
Abstract
No abstract record available.
Inventors
- 👤 Kessler Gerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:08
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/48; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49876
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1135352A
Cited
US1697768A
Cited
US2335361A
Cited
US2639769A
Cited
US2797750A
Cited
US2835325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |