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Patent US3359448A successfully refreshed from Google Patents.
US3359448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low work function thin film gap emitter
Assignee: Research Corp
•
Filing: 1964-11-04
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Granted: 1967-12-19
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Expires: 1984-11-04
Abstract
No abstract record available.
Inventors
- 👤 Nicolas M Bashara
- 👤 Donald G Schueler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:51
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/316
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A LOW WORK FUNCTION EMISSION SOURCE COMPRISING A VERY THIN METALLIC FILM; A NARROW DIELECTRIC GAP FORMED IN SAID FILM, TRAVERSING THE SAME AND SEPARATING THE FILM INTO TWO ELECTRICALLY INSULATED SPACED PORTIONS; THE SEPARATION BETWEEN SAID PORTIONS BEING OF THE ORDER OF 100,000 ANGSTROMS AND A PLURALITY OF DISCRETE, METALLIC ISLAND ELEMENTS POSITIONED ADJACENT THE SPACED FILM PORTIONS AND BETWEEN THE BOUNDARIES OF SAID GAP.
Claim 2
Dependent Claim
66 words
A LOW WORK FUNCTION EMISSION SOURCE COMPRISING A VERY THIN METALLIC FILM; A NARROW DIELECTRIC GAP FORMED IN SAID FILM, TRAVERSING THE SAME AND SEPARATING THE FILM INTO TWO ELECTRICALLY INSULATED SPACED PORTIONS; THE SEPARATION BETWEEN SAID PORTIONS BEING OF THE ORDER OF 100,000 ANGSTROMS AND A PLURALITY OF DISCRETE, METALLIC ISLAND ELEMENTS POSITIONED ADJACENT THE SPACED FILM PORTIONS AND BETWEEN THE BOUNDARIES OF SAID GAP.
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |