Patent US2825129A successfully refreshed from Google Patents.
US2825129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television cone construction
Assignee: Mcdowell Manufacturing Co
•
Filing: 1951-01-20
•
Granted: 1958-03-04
•
Expires: 1971-01-20
Abstract
No abstract record available.
Inventors
- 👤 Gustav A Hempel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:09
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/24; H01J9/244
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US671427A
Cited
US1568283A
Cited
US1715683A
Cited
US2014815A
Cited
US2136933A
Cited
US2232098A
Cited
US2422883A
Cited
US2415940A
Cited
US2682963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |