Patent US3527909A successfully refreshed from Google Patents.
US3527909A
Expired / Lapsed
US
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Differential pressure sensitive switch
Assignee: Individual
•
Filing: 1968-05-02
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Granted: 1970-09-08
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Expires: 1988-05-02
Abstract
No abstract record available.
Inventors
- 👤 Jean Torre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:00
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/34; G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/16; G01M3/18; G01M3/186; G01M3/187; G01M3/26; G01M3/32; G01M3/3218; G01M3/3236; G01M3/3263; G01M3/36; G01M3/366; F; F16; F16L; F16L2101/00; F16L2101/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |