US2287172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for refrigeration and air conditioning
Assignee: LAURENCE S HARRISON
•
Filing: 1939-01-10
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Granted: 1942-06-23
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Expires: 1959-01-10
Abstract
No abstract record available.
Inventors
- 👤 Laurence S Harrison
- 👤 Allen A Canton
- 👤 Alfred G Kay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:52
CPC Classifications
F; F25; F25B; F25B17/00; F25B17/08; F25B17/083; B; B60; B60H; B60H1/00; B60H1/32; B60H1/3201; B60H1/32014; F25B27/00; F25B27/02; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02A30/274
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-06-22 | 1945-12-22 | 1946-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-06-22 | 1949-12-22 | 1950-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-06-22 | 1953-12-22 | 1954-06-23 | $7700.00 | Window Closed / Lapsed |