Patent US3404302A successfully refreshed from Google Patents.
US3404302A
Expired / Lapsed
US
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Envelope wall with two continuous ledges for positioning and supporting aperture mask
Assignee: General Electric Co
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Filing: 1967-06-21
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Granted: 1968-10-01
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Expires: 1987-06-21
Abstract
No abstract record available.
Inventors
- 👤 William H Nicklas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:23
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/06; H01J29/07; H01J29/073
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2690518A
Cited
US2824989A
Cited
US2961560A
Cited
US2897392A
Cited
US3038096A
Cited
US2906904A
Cited
US3005921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |