Patent US2728064A successfully refreshed from Google Patents.
US2728064A
Expired / Lapsed
US
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Position indicator for elevator cars
Assignee: Westinghouse Electric Corp
•
Filing: 1951-03-14
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Granted: 1955-12-20
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Expires: 1971-03-14
Abstract
No abstract record available.
Inventors
- 👤 Savage Conwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:15
CPC Classifications
B; B66; B66B; B66B3/00; B66B3/02
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-19 | 1959-06-20 | 1959-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-19 | 1963-06-20 | 1963-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-19 | 1967-06-20 | 1967-12-20 | $7700.00 | Window Closed / Lapsed |