US2704345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-speed alternating-current motor system
Assignee: General Time Corp
•
Filing: 1952-02-16
•
Granted: 1955-03-15
•
Expires: 1972-02-16
Abstract
No abstract record available.
Inventors
- 👤 Helmar O Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:21
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/04; H02K17/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US603778A
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US1147168A
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US1894804A
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US1896855A
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US2040763A
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US2091665A
Cited
US2095281A
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US2406193A
Cited
US2554956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |