Patent US3550475A successfully refreshed from Google Patents.
US3550475A
Expired / Lapsed
US
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Reduction-gear motor
Assignee: VISH MACHINO FLEKTROTECHNITCHE
•
Filing: 1969-05-09
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Granted: 1970-12-29
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Expires: 1989-05-09
Abstract
No abstract record available.
Inventors
- 👤 Mihail Spirov Konstantinov
- 👤 Dragomir Svetoslavov Dragiev
- 👤 Penka Jossifova Genova
- 👤 Petar Ivanov Tzenov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:31
CPC Classifications
B; B23; B23Q; B23Q27/00; F; F16; F16H; F16H49/00; F16H49/001; F16H2049/003; Y; Y10; Y10T; Y10T74/00; Y10T74/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |