Patent US766865A successfully refreshed from Google Patents.
US766865A
Expired / Lapsed
US
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Locking device for electromagnets.
Assignee: Otis Elevator Co
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Filing: 1903-09-22
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Granted: 1904-08-09
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Expires: 1923-09-22
Abstract
No abstract record available.
Inventors
- 👤 William Baxter Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:04
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/02; H01H51/04; H01H51/06; H01H51/08; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607
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) | 1907-08-09 | 1908-02-08 | 1908-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-08-09 | 1912-02-08 | 1912-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-08-09 | 1916-02-08 | 1916-08-09 | $7700.00 | Window Closed / Lapsed |