Patent US3020627A successfully refreshed from Google Patents.
US3020627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil-fabricating method
Assignee: Northrop Grumman Corp
•
Filing: 1956-07-06
•
Granted: 1962-02-13
•
Expires: 1976-07-06
Abstract
No abstract record available.
Inventors
- 👤 Edward L Swainson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:37
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; 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)
US542945A
Cited
US1134840A
Cited
US2177260A
Cited
US2166841A
Cited
US2282759A
Cited
DE859501C
Cited
US2350822A
Cited
US2448672A
Cited
US2453749A
Cited
US2743508A
Cited
US2627008A
Cited
US2766392A
Cited
US2868934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |