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Patent US3275905A successfully refreshed from Google Patents.
US3275905A
Expired / Lapsed
US
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Thin film tetrode
Assignee: Unisys Corp
•
Filing: 1963-05-31
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Granted: 1966-09-27
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Expires: 1983-05-31
Abstract
No abstract record available.
Inventors
- 👤 Solomon R Pollack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:10
CPC Classifications
H; H10; H10D; H10D8/00; H10D8/70; H10D10/00; H10D48/00; H10D48/30; H10D48/32; H10D64/00; H10D84/00; H10D84/60; H10D84/645; H10D99/00; H10N; H10N70/00; Y; Y10; Y10S; Y10S148/00; Y10S148/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A THIN FILM TUNNEL EMISSION DEVICE COMPRISING A FIRST ELECTRICALLY CONDUCTIVE METALLIC FILM, A SECOND ELEC-
Claim 2
Dependent Claim
16 words
A THIN FILM TUNNEL EMISSION DEVICE COMPRISING A FIRST ELECTRICALLY CONDUCTIVE METALLIC FILM, A SECOND ELEC-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |