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Patent US2519913A successfully refreshed from Google Patents.
US2519913A
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US
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Helical rotary compressor with pressure and volume regulating means
Assignee: JARVIS C MARBLE
•
Filing: 1943-08-21
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Granted: 1950-08-22
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Expires: 1963-08-21
Abstract
No abstract record available.
Inventors
- 👤 Lysholm Alf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:28
CPC Classifications
F; F04; F04C; F04C28/00; F04C28/10; F04C28/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB251934A
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GB384355A
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GB420501A
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GB464494A
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US2243874A
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US2174522A
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GB472488A
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Cited
US2383979A
Cited
US2311936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |