US2973771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft speed limiting apparatus
Assignee: Carrier Corp
•
Filing: 1959-02-04
•
Granted: 1961-03-07
•
Expires: 1979-02-04
Abstract
No abstract record available.
Inventors
- 👤 Eugene W Barth
- 👤 James R Shields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:18
CPC Classifications
F; F01; F01D; F01D21/00; F01D21/02; F01D21/16; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/108; Y10T137/1153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1713148A
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US1961813A
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DE915528C
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DE946589C
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US2922000A
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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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |