Patent DE565216C successfully refreshed from Google Patents.
US3435643A
Expired / Lapsed
US
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Emergency door lock having alarm means
Assignee: BENNETT B HARMAN
•
Filing: 1966-03-21
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Granted: 1969-04-01
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Expires: 1986-03-21
Abstract
No abstract record available.
Inventors
- 👤 Edward C Pollak
- 👤 Bennett B Harman
- 👤 William Solomon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:08
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/10; E05B65/1046; E05B65/106; E05B65/1073; E05B65/108; E05B45/00; E05B45/06; E05C; E05C3/00; E05C3/12; E05C3/16; E05C3/22; E05C3/24; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0908; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5159
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1435971A
Cited
DE1085067B
Cited
US2922150A
Cited
US3038436A
Cited
US3201163A
Cited
US3334934A
Cited
CH545462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |