US2940273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purging arrangements for absorption refrigeration systems
Assignee: Carrier Corp
•
Filing: 1956-02-14
•
Granted: 1960-06-14
•
Expires: 1976-02-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Louis H Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:49
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/04; F25B43/046
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2363381A
Cited
US2374521A
Cited
US2363440A
Cited
US2400138A
Cited
US2400137A
Cited
US2426069A
Cited
US2494972A
Cited
US2522410A
Cited
US2510737A
Cited
US2473384A
Cited
US2610482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |