Patent US921401A successfully refreshed from Google Patents.
US921401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-fitting key.
Assignee: Individual
•
Filing: 1907-06-26
•
Granted: 1909-05-11
•
Expires: 1927-06-26
Abstract
No abstract record available.
Inventors
- 👤 Henry J Hjorth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:50
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; F16D1/08; F16D1/0876; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7018; Y10T403/7021; Y10T403/7024
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1912-05-10 | 1912-11-09 | 1913-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-05-10 | 1916-11-09 | 1917-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-05-10 | 1920-11-09 | 1921-05-11 | $7700.00 | Window Closed / Lapsed |