US2929943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamo-electric machine cooling structure
Assignee: CA Parsons and Co Ltd
•
Filing: 1956-12-24
•
Granted: 1960-03-22
•
Expires: 1976-12-24
Abstract
No abstract record available.
Inventors
- 👤 Richardson Philip
- 👤 Alfred P Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:57
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2265288A
Cited
US2295019A
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US2390130A
Cited
US2462451A
Cited
US2780739A
Cited
US2727161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |