Patent US3500170A successfully refreshed from Google Patents.
US3500170A
Expired / Lapsed
US
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D.c.-a.c. converters
Assignee: Telemecanique SA
•
Filing: 1968-11-18
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Granted: 1970-03-10
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Expires: 1988-11-18
Abstract
No abstract record available.
Inventors
- 👤 Jean Pierre Charrin
- 👤 Jacques Hermier
- 👤 Michel George E Lalande
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:01
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2068; B01D39/2082; B01D39/2089; H; H02; H02M; H02M1/00; H02M1/06; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/5152; H02M7/521
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3262036A
Cited
US3321697A
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US3219905A
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US3263153A
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US3340453A
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US3379955A
Cited
US3388310A
Cited
US3408551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |