US2873009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking system for elevators
Assignee: Individual
•
Filing: 1955-11-15
•
Granted: 1959-02-10
•
Expires: 1975-11-15
Abstract
No abstract record available.
Inventors
- 👤 Stelzer William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:24
CPC Classifications
B; B66; B66D; B66D5/00; B66D5/02; B66D5/24; B66D5/26; B66B; B66B11/00; B66B11/04; B66B11/043; B66B11/0484; B66D2700/00; B66D2700/03; B66D2700/035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US812758A
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US2023689A
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US2194228A
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US2285134A
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US2406644A
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US2572528A
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US2554330A
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US2618368A
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US2642169A
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US2675103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |