US2876002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control systems
Assignee: Individual
•
Filing: 1955-08-02
•
Granted: 1959-03-03
•
Expires: 1975-08-02
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Purdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:35
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/70; E05F15/77; E05F15/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2149177A
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US2450021A
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US2676294A
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US2742280A
Cited
US2572785A
Cited
US2641713A
Cited
US2697803A
Cited
US2672582A
Cited
US2750453A
Cited
US2760134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |