US938487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-pressure combination-lock.
Assignee: Individual
•
Filing: 1909-06-19
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Granted: 1909-11-02
•
Expires: 1929-06-19
Abstract
No abstract record available.
Inventors
- 👤 William J Hofstatter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:43
CPC Classifications
E; E05; E05B; E05B51/00; E05B51/02; Y; Y10; Y10S; Y10S70/00; Y10S70/48; Y10T; Y10T70/00; Y10T70/70; Y10T70/7051; Y10T70/7153; Y10T70/7181; Y10T70/7198; Y10T70/7237; Y10T70/7243; Y10T70/7249; Y10T70/726; Y10T70/7271
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1912-11-01 | 1913-05-03 | 1913-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-11-01 | 1917-05-03 | 1917-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-11-01 | 1921-05-03 | 1921-11-02 | $7700.00 | Window Closed / Lapsed |