Patent US3134866A successfully refreshed from Google Patents.
US3134866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring chamber liquid level switch with dual glass viewing panels
Assignee: Individual
•
Filing: 1961-04-17
•
Granted: 1964-05-26
•
Expires: 1981-04-17
Abstract
No abstract record available.
Inventors
- 👤 Frank W Murphy
- 👤 Jr Frank W Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:31
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/32; G01F23/34; H; H01; H01H; H01H35/00; H01H35/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1307189A
Cited
US2203766A
Cited
US2239071A
Cited
US2278279A
Cited
US2467189A
Cited
US2484038A
Cited
US2601142A
Cited
US2623143A
Cited
US2877318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |