US1994767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making inductances
Assignee: Heintz & Kaufman Ltd
•
Filing: 1934-06-27
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Granted: 1935-03-19
•
Expires: 1954-06-27
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Heintz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:20
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/041; H01F27/00; H01F27/28; H01F27/2804; H01F27/2814; H01F17/00; H01F17/0006; H01F2017/004; Y; Y10; Y10T; Y10T29/00; Y10T29/30; Y10T29/301; Y10T29/308; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071; Y10T29/4981; Y10T29/49812
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) | 1938-03-18 | 1938-09-17 | 1939-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-18 | 1942-09-17 | 1943-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-18 | 1946-09-17 | 1947-03-19 | $7700.00 | Window Closed / Lapsed |