Patent US2644099A successfully refreshed from Google Patents.
US2644099A
Expired / Lapsed
US
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Explosion-resistant motor
Assignee: Westinghouse Electric Corp
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Filing: 1951-02-28
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Granted: 1953-06-30
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Expires: 1971-02-28
Abstract
No abstract record available.
Inventors
- 👤 Leon R Ludwig
- 👤 Theodore C Fockler
- 👤 William H Formhals
- 👤 Howard T Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:01
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/10; H02K9/00; H02K9/02; H02K9/04; H02K9/06; H02K9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |