Patent US2760355A successfully refreshed from Google Patents.
US2760355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of returning oil from an element of a refrigeration system to the compressor thereof
Assignee: Carrier Corp
•
Filing: 1952-05-22
•
Granted: 1956-08-28
•
Expires: 1972-05-22
Abstract
No abstract record available.
Inventors
- 👤 Richard H Swart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:31
CPC Classifications
F; F25; F25B; F25B31/00; F25B31/002; F25B31/004; F25B43/00; F25B43/006
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE89935C
Cited
US302294A
Cited
US1899378A
Cited
US2134768A
Cited
US2440146A
Cited
US2512758A
Cited
US2614402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |