US3437104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined air eliminator and vacuum breaker
Assignee: Liquid Controls Corp
•
Filing: 1966-10-12
•
Granted: 1969-04-08
•
Expires: 1986-10-12
Abstract
No abstract record available.
Inventors
- 👤 George B Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:16
CPC Classifications
F; F16; F16K; F16K24/00; F16K24/04; F16K24/042; F16K24/048; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/309; Y10T137/3099
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3021861A
Cited
US3230966A
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 |