US2981970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double acting spring hinge
Assignee: MILWAUKEE STAMPING Co
•
Filing: 1957-07-29
•
Granted: 1961-05-02
•
Expires: 1977-07-29
Abstract
No abstract record available.
Inventors
- 👤 Charles A E Nayes
- 👤 Milton J Robinson
- 👤 Raymond J Buettner
- 👤 Walter R Sievert
- 👤 Richard W Sievert
- 👤 John F Svoboda
- 👤 Joseph O Eckmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:26
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/123; Y; Y10; Y10S; Y10S16/00; Y10S16/36; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606
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) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |