Patent US3381668A successfully refreshed from Google Patents.
US3381668A
Expired / Lapsed
US
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Rotary machine
Assignee: SVEDIA DENTAL IND AB
•
Filing: 1965-10-22
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Granted: 1968-05-07
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Agren Bengt Assar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:17
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0827; F01C21/0836; F01C21/18; C; C01; C01B; C01B6/00; F01C1/00; F01C1/30; F01C1/34; F01C1/344; F01C1/3441; F01C1/3442; F01C2021/12; F01C2021/16; F01C2021/1675; F02; F02B; F02B53/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US449821A
Cited
GB191214458A
Cited
US1661593A
Cited
US2033218A
Cited
US2073101A
Cited
US2192660A
Cited
US2827857A
Cited
US2808780A
Cited
US2916999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |