Patent US2673475A successfully refreshed from Google Patents.
Patent US3437771A successfully refreshed from Google Patents.
US3437771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level sensing means
Assignee: ROYLYN Inc
•
Filing: 1967-05-09
•
Granted: 1969-04-08
•
Expires: 1987-05-09
Abstract
No abstract record available.
Inventors
- 👤 Henry Nusbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:51
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/64; G01F23/72; G01F23/74; G01F23/76; H; H01; H01H; H01H36/00; H01H36/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8342
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2915605A
Cited
US3200645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |