US2820477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas mixing valve
Assignee: GORDON ARMSTRONG Co Inc
•
Filing: 1956-03-05
•
Granted: 1958-01-21
•
Expires: 1976-03-05
Abstract
No abstract record available.
Inventors
- 👤 John W Dorsak
- 👤 Thomas F Van Denberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:22
CPC Classifications
A; A61; A61G; A61G11/00; A61M; A61M16/00; A61M16/10; A61M16/12; B; B01; B01F; B01F25/00; B01F25/105; B01F25/1051; F; F16; F16K; F16K11/00; F16K11/10; F16K11/14; F16K11/16; F16K11/163; F16K11/166; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T137/8593; Y10T137/86493; Y10T137/86863; Y10T137/87571; Y10T137/87587; Y10T137/87619; Y10T137/87627
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |