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Patent US2828456A successfully refreshed from Google Patents.
US2828456A
Expired / Lapsed
US
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Servomechanism
Assignee: Sperry Products Inc
•
Filing: 1953-11-27
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Granted: 1958-03-25
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Expires: 1973-11-27
Abstract
No abstract record available.
Inventors
- 👤 Lawrence J Kamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:50
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/21; G05B19/23; G05B2219/00; G05B2219/30; G05B2219/41; G05B2219/41105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2588213A
Cited
US2455364A
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US2494922A
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US2436172A
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US2630552A
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US2560337A
Cited
US2645321A
Cited
US2662998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |