US3482415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion valve for heat pump
Assignee: Individual
•
Filing: 1968-03-01
•
Granted: 1969-12-09
•
Expires: 1988-03-01
Abstract
No abstract record available.
Inventors
- 👤 Allen Trask
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:19
CPC Classifications
F; F25; F25B; F25B13/00; F25B2600/00; F25B2600/25; F25B2600/2505; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7925; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1891357A
Cited
US1985134A
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US2056482A
Cited
US2206356A
Cited
US2287840A
Cited
US2785540A
Cited
US2928417A
Cited
US3066497A
Cited
US3150501A
Cited
US3274793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |