US3616732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aperture mask optical system
Assignee: Buckbee Mears Co
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Filing: 1969-11-06
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Granted: 1971-11-02
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Expires: 1989-11-06
Abstract
Abstract A METHOD FOR UTILIZING A SHADOW MASK AS A PATTERN FOR LAYING DOWN A PHOSPHORUS DOT PATTERN WITHOUT AFFECTING THE PHYSICAL CHARACTERISTICS OF THE MASK.
Inventors
- 👤 Michael E Rucinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:17
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271; H01J29/00; H01J29/02; H01J29/06; H01J29/07
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |