US1681008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door-knob construction
Assignee: Emhart Industries Inc
•
Filing: 1927-03-14
•
Granted: 1928-08-14
•
Expires: 1947-03-14
Abstract
No abstract record available.
Inventors
- 👤 Petermann Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:38
CPC Classifications
E; E05; E05B; E05B3/00; E05B3/10; Y; Y10; Y10T; Y10T292/00; Y10T292/85; Y10T292/858; Y10T292/93
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) | 1931-08-14 | 1932-02-13 | 1932-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-08-14 | 1936-02-13 | 1936-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-08-14 | 1940-02-13 | 1940-08-14 | $7700.00 | Window Closed / Lapsed |