US1028807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic-elevator safety device.
Assignee: Otis Elevator Co
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Filing: 1905-11-23
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Granted: 1912-06-04
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Expires: 1925-11-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:03
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/02; B66B1/04; F; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30525
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) | 1915-06-04 | 1915-12-04 | 1916-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1919-06-04 | 1919-12-04 | 1920-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1923-06-04 | 1923-12-04 | 1924-06-04 | $7700.00 | Window Closed / Lapsed |