US2985855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating for sheet steel in transformer cores
Assignee: Allis Chalmers Corp
•
Filing: 1957-01-11
•
Granted: 1961-05-23
•
Expires: 1977-01-11
Abstract
No abstract record available.
Inventors
- 👤 Norman E Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:52
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/25; H01F41/00; H01F41/02; H01F41/0206; H01F41/0213; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1454323A
Cited
US2289339A
Cited
US2261983A
Cited
US2394047A
Cited
US2390863A
Cited
US2389497A
Cited
GB587374A
Cited
US2410220A
Cited
US2561462A
Cited
US2655101A
Cited
US2501349A
Cited
US2670026A
Cited
US2584564A
Cited
US2699195A
Cited
US2864065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |