Patent US2898484A successfully refreshed from Google Patents.
US2898484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration cooling of electrical machines
Assignee: Individual
•
Filing: 1954-08-23
•
Granted: 1959-08-04
•
Expires: 1974-08-23
Abstract
No abstract record available.
Inventors
- 👤 Krastchew Christoslaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:02
CPC Classifications
H; H02; H02K; H02K9/00; H02K3/00; H02K3/04; H02K3/22; H02K3/24
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |