US920820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator safety-lock.
Assignee: Individual
•
Filing: 1905-08-30
•
Granted: 1909-05-04
•
Expires: 1925-08-30
Abstract
No abstract record available.
Inventors
- 👤 Edward J Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:15
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/02; B66B1/06; B66B1/08; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3936; Y10T24/394; Y10T24/3951; Y10T24/44; Y10T24/44291; Y10T24/44325; Y10T24/44368
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) | 1912-05-03 | 1912-11-02 | 1913-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-05-03 | 1916-11-02 | 1917-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-05-03 | 1920-11-02 | 1921-05-04 | $7700.00 | Window Closed / Lapsed |