US3464528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety control system for a cable drum
Assignee: NORTHWEST ENGINEERING Co A CORP OF
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Filing: 1967-08-02
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Granted: 1969-09-02
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Expires: 1987-08-02
Abstract
No abstract record available.
Inventors
- 👤 George W Mork
- 👤 Vernon F Waldron
- 👤 Robert C Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:59
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/02; B66D1/14; B66D2700/00; B66D2700/01; B66D2700/0125; B66D2700/0158
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1479034A
Cited
US2279597A
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US2521486A
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US2675103A
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US2836270A
Cited
US2975584A
Cited
US3198301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |