US3050155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective mechanism for doors
Assignee: Otis Elevator Co
•
Filing: 1953-12-21
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Granted: 1962-08-21
•
Expires: 1973-12-21
Abstract
No abstract record available.
Inventors
- 👤 Karmel Philip
- 👤 Jr Benjamin Whitehead Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:33
CPC Classifications
B; B66; B66B; B66B13/00; B66B13/24; B66B13/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |