Patent US3028531A successfully refreshed from Google Patents.
US3028531A
Expired / Lapsed
US
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Automatic shut height motor control circuit
Assignee: Danly Machine Specialties Inc
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Filing: 1957-07-29
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Granted: 1962-04-03
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Expires: 1977-07-29
Abstract
No abstract record available.
Inventors
- 👤 Francis E Heiberger
- 👤 Daniel T Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:35
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/0029; B30B15/0041; Y; Y10; Y10S; Y10S100/00; Y10S100/918; Y10T; Y10T83/00; Y10T83/869; Y10T83/8696
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB715970A
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US2724795A
Cited
US2769124A
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US2801825A
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US2796569A
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US2886754A
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US2905877A
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US2889507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |