Patent US2900733A successfully refreshed from Google Patents.
US2900733A
Expired / Lapsed
US
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Indicators with resilient means for reversing the bias of the operating spindle
Assignee: Lufkin Rule Co
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Filing: 1955-05-04
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Granted: 1959-08-25
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Expires: 1975-05-04
Abstract
No abstract record available.
Inventors
- 👤 Zelnick Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:23
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/22; G01B5/00; G01B5/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1466664A
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US2242151A
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US2345845A
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US2400293A
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US2483743A
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US2660799A
Cited
US2527173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |