Patent US1312899A successfully refreshed from Google Patents.
US2646212A
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Oil level equalizing device for multiple compressor arrangement
Assignee: Individual
•
Filing: 1950-11-30
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Granted: 1953-07-21
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Expires: 1970-11-30
Abstract
No abstract record available.
Inventors
- 👤 Edward P Kellie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:49
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/12; F04B39/128; F04B39/02; F04B39/0207; F25; F25B; F25B31/00; F25B31/002; F25B1/00; F25B1/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7439; Y10T137/8593; Y10T137/85978; Y10T137/86131; Y10T137/86139
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2178100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |