US2556882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning refrigeration system
Assignee: Westinghouse Electric Corp
•
Filing: 1948-05-29
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Granted: 1951-06-12
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Expires: 1968-05-29
Abstract
No abstract record available.
Inventors
- 👤 William A Minkler
- 👤 Eldon H Lusk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:19
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0007; F24F5/001; F25; F25B; F25B2600/00; F25B2600/02; F25B2600/026; F25B6/00; F25B6/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |