US2441228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic grid winding machine
Assignee: National Union Radio Corp
•
Filing: 1945-08-08
•
Granted: 1948-05-11
•
Expires: 1965-08-08
Abstract
No abstract record available.
Inventors
- 👤 Schneider Gerhard Gunther
- 👤 Frank L Donohue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:10
CPC Classifications
H; H01; H01J; H01J19/00; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0026
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US844541A
Cited
US1002455A
Cited
US1585905A
Cited
US1814770A
Cited
US1897460A
Cited
US1874575A
Cited
US1994307A
Cited
US1970599A
Cited
US2181288A
Cited
US2188906A
Cited
US2237466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-11 | 1951-11-10 | 1952-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-11 | 1955-11-10 | 1956-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-11 | 1959-11-10 | 1960-05-11 | $7700.00 | Window Closed / Lapsed |