US1700840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-transfer means for closed rotating electrical machinery
Assignee: Individual
•
Filing: 1928-05-07
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Granted: 1929-02-05
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Expires: 1948-05-07
Abstract
No abstract record available.
Inventors
- 👤 Frazer W Gay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:42
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/0208; H; H02; H02K; H02K9/00; H02K9/22; H02K9/225
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) | 1932-02-05 | 1932-08-06 | 1933-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-02-05 | 1936-08-06 | 1937-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-02-05 | 1940-08-06 | 1941-02-05 | $7700.00 | Window Closed / Lapsed |