US2527657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating system for refrigerator motor-compressors
Assignee: Pressed Steel Co Ltd
•
Filing: 1946-12-03
•
Granted: 1950-10-31
•
Expires: 1966-12-03
Abstract
No abstract record available.
Inventors
- 👤 Rowledge Eric George
- 👤 Kitson Joshua Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:12
CPC Classifications
F; F25; F25B; F25B31/00; F25B31/02; F25B31/002; Y; Y10; Y10S; Y10S417/00; Y10S417/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1687780A
Cited
US1858817A
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US1731774A
Cited
US1947586A
Cited
US2167057A
Cited
US2236112A
Cited
US2236088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |