US2947557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking device
Assignee: Individual
•
Filing: 1959-04-24
•
Granted: 1960-08-02
•
Expires: 1979-04-24
Abstract
No abstract record available.
Inventors
- 👤 Fredric W Schwab
- 👤 Gordon B Mckay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:56
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/18; E04H12/182; Y; Y10; Y10T; Y10T403/00; Y10T403/60; Y10T403/70; Y10T403/7075; Y10T403/7077
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) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |