US2755990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Housing construction for displacement engines of screw rotor type
Assignee: Svenska Rotor Maskiner AB
•
Filing: 1949-08-02
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Granted: 1956-07-24
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Expires: 1969-08-02
Abstract
No abstract record available.
Inventors
- 👤 Nilsson Hans Robert
- 👤 Persson Per Walther Sigvard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:05
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/08; F04C18/12; F04C18/14; F04C18/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US584067A
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US1315234A
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US1197579A
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US1386792A
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US2062045A
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GB335735A
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US1851193A
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FR688172A
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US2014932A
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US2111568A
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US2287716A
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US2410172A
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US2477002A
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US2504841A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |