US1912586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling for electric machines
Assignee: Ljungstroms Angturbin AB
•
Filing: 1930-05-29
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Granted: 1933-06-06
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Expires: 1950-05-29
Abstract
No abstract record available.
Inventors
- 👤 Lysholm Alf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:29
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/32; H02K1/12; H02K1/20; H02K1/26; H02K2201/00; H02K2201/06
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) | 1936-06-05 | 1936-12-05 | 1937-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-06-05 | 1940-12-05 | 1941-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-06-05 | 1944-12-05 | 1945-06-06 | $7700.00 | Window Closed / Lapsed |