Patent US2821644A successfully refreshed from Google Patents.
US2821644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mountings for picture tube grids
Assignee: OI Glass Inc
•
Filing: 1954-11-10
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Granted: 1958-01-28
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Expires: 1974-11-10
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Henry
- 👤 Harvard B Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:23
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/80; H01J29/803
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23735E
Cited
US2540835A
Cited
US2546828A
Cited
US2711493A
Cited
US2695372A
Cited
US2682620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |