Patent US2672887A successfully refreshed from Google Patents.
US2672887A
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US
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Multiple-port valve for air conditioning systems
Assignee: Tipton Heat Pump & Valve Corp
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Filing: 1950-07-21
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Granted: 1954-03-23
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Expires: 1970-07-21
Abstract
No abstract record available.
Inventors
- 👤 Virgil W Tipton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:13
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F25; F25B; F25B41/00; F25B41/20; F25B41/26; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86839
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US405959A
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US685741A
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US2259756A
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US2342174A
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US2351140A
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US2444815A
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US2434586A
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US2474304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |