US3440477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple readout electron beam device
Assignee: AT&T Inc
•
Filing: 1967-10-18
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Granted: 1969-04-22
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Expires: 1987-10-18
Abstract
No abstract record available.
Inventors
- 👤 Merton H Crowell
- 👤 Eugene I Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/58; H01J31/60; H01J31/62; H01J31/64; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; Y; Y10; Y10S; Y10S148/00; Y10S148/172
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2972082A
Cited
US3322955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |