US3519869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shadow mask having apertures progressively tapered from center to periphery
Assignee: Nihon Victor KK
•
Filing: 1968-04-10
•
Granted: 1970-07-07
•
Expires: 1988-04-10
Abstract
No abstract record available.
Inventors
- 👤 Hideo Kuniyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:24
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/06; H01J29/07; H01J29/076; H01J29/46; H01J29/80; H01J29/803
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2663821A
Cited
US2750524A
Cited
US2806165A
Cited
US2971117A
Cited
US2951179A
Cited
US2947899A
Cited
US3231380A
Cited
US3398309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |