Patent US3453510A successfully refreshed from Google Patents.
US3453510A
Expired / Lapsed
US
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Linear and rotary direct current stepping motors and control system
Assignee: Robertshaw Controls Co
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Filing: 1966-08-26
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Granted: 1969-07-01
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Expires: 1986-08-26
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G Kreuter
- 👤 Larry S Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:25
CPC Classifications
H; H02; H02K; H02K37/00; H02K37/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2105513A
Cited
US2503513A
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US2627040A
Cited
US2890392A
Cited
US2914717A
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US3005941A
Cited
US3164759A
Cited
US3165681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |