US3399604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water pressure activated switch
Assignee: Melpar Inc
•
Filing: 1966-07-25
•
Granted: 1968-09-03
•
Expires: 1986-07-25
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Shewmake
- 👤 Joseph L Pentecost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:55
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US522972A
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US2731977A
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US1416210A
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US1946175A
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US2298938A
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US2611057A
Cited
US2650673A
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US3216326A
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US3349203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |