US2873909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary devices and casing structures therefor
Assignee: Svenska Rotor Maskiner AB
•
Filing: 1954-10-26
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Granted: 1959-02-17
•
Expires: 1974-10-26
Abstract
No abstract record available.
Inventors
- 👤 Nilsson Hans Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:29
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/06; F01C1/00; F01C1/08; F01C1/082; F01C1/086; F01C1/12; F01C1/14; F01C1/16
Claims Analysis
Total Claims: 0
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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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |