Patent US2999640A successfully refreshed from Google Patents.
US2999640A
Expired / Lapsed
US
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Air conditioning mixing valve
Assignee: Buensod Stacey Corp
•
Filing: 1957-06-12
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Granted: 1961-09-12
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Expires: 1977-06-12
Abstract
No abstract record available.
Inventors
- 👤 Robert W Waterfill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:27
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044; F24F3/048; F24F3/052; F24F3/0522; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7801; Y10T137/8593; Y10T137/86493; Y10T137/86847
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US989543A
Cited
US986165A
Cited
US1000435A
Cited
US1087908A
Cited
US1076293A
Cited
GB253317A
Cited
US1819045A
Cited
FR728667A
Cited
US1901268A
Cited
US1996330A
Cited
US2624541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |