Patent US3423252A successfully refreshed from Google Patents.
Patent US2044873A successfully refreshed from Google Patents.
US2044873A
Expired / Lapsed
US
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Rotary compressor
Assignee: Individual
•
Filing: 1933-11-21
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Granted: 1936-06-23
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Expires: 1953-11-21
Abstract
No abstract record available.
Inventors
- 👤 Cecil J Beust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:02
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0881; F01C21/0818; F01C21/0827; F01C21/0836; F04; F04C; F04C27/00; F04C27/005; F04C27/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-06-23 | 1939-12-23 | 1940-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-06-23 | 1943-12-23 | 1944-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-06-23 | 1947-12-23 | 1948-06-23 | $7700.00 | Window Closed / Lapsed |