Patent US867419A successfully refreshed from Google Patents.
Patent US1708710A successfully refreshed from Google Patents.
Patent FR890926A successfully refreshed from Google Patents.
Patent US3423017A successfully refreshed from Google Patents.
US3423017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw rotor machine and rotors therefor
Assignee: Svenska Rotor Maskiner AB
•
Filing: 1967-07-07
•
Granted: 1969-01-21
•
Expires: 1987-07-07
Abstract
No abstract record available.
Inventors
- 👤 Lauritz Benedictus Schibbye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:09
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/08; F01C1/082; F01C1/084; F04; F04C; F04C18/00; F04C18/08; F04C18/082; F04C18/084; F04C18/12; F04C18/14; F04C18/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2174522A
Cited
US2486770A
Cited
US2622787A
Cited
US3289600A
Cited
US3314598A
Cited
US3245612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |