US3517639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pure fluid annunciator
Assignee: United States Department of the Navy
•
Filing: 1968-07-08
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Granted: 1970-06-30
•
Expires: 1988-07-08
Abstract
No abstract record available.
Inventors
- 👤 Ronald J Whitsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:57
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/08; G01L19/12; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/284; G01F23/292; G01F23/2921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2240988A
Cited
US2350712A
Cited
US2589569A
Cited
US3326048A
Cited
US3436500A
Cited
US3389950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |