Patent US3574013A successfully refreshed from Google Patents.
US3574013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aperture mask for color tv picture tubes and method for making same
Assignee: Buckbee Mears Co
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Filing: 1969-01-06
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Granted: 1971-04-06
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Expires: 1989-01-06
Abstract
Abstract APERTURE MASKS FOR COLOR TV PICTURE TUBES ARE FORMED INITIALLY WITH THE HOLE PARTIALLY CLOSED FOR USE IN LAYING DOWN PHOSPHOR DOT PATTERNS ON THE TUBE SCREEN AFTER WHICH THE HOLES ARE OPENED FOR NORMAL OPERATION OF THE MASKS AS PART OF THE FINISHED TUBE.
Inventors
- 👤 John J Frantzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:41
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/14; H01J9/142; H01J29/00; H01J29/02; H01J29/06; H01J29/07; H01J2229/00; H01J2229/07; H01J2229/0727; H01J2229/0777; Y; Y10; Y10S; Y10S156/00; Y10S156/918; Y10S156/919; Y10S156/922; Y10T; Y10T156/00; Y10T156/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |