US2676244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doorknob with illuminating means
Assignee: Individual
•
Filing: 1952-02-07
•
Granted: 1954-04-20
•
Expires: 1972-02-07
Abstract
No abstract record available.
Inventors
- 👤 Robert J Dittman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:30
CPC Classifications
E; E05; E05B; E05B17/00; E05B17/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1035879A
Cited
US1230942A
Cited
US1291494A
Cited
US1331959A
Cited
US2005274A
Cited
US2007101A
Cited
GB533189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |