US3271280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing coldemission cathodes
Assignee: Thales SA
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Filing: 1963-06-04
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Granted: 1966-09-06
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Expires: 1983-06-04
Abstract
No abstract record available.
Inventors
- 👤 Arvind M Shroff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:49
CPC Classifications
C; C25; C25F; C25F7/00; H; H01; H01J; H01J9/00; H01J9/02; H01J9/022; H01J9/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A METHOD FOR MANUFACTURING COLD-EMISSION CATHODES HAVING A PLURALITY OF SUBSTANTIALLY PARALLEL POINT-ENDED METAL RODS, COMPRISING THE STEPS OF: PASSING SAID RODS THROUGH THE MOLES IN A GRID-LIKE STRUCTURE THE DIAMETER OF SAID HOLES BEING SLIGHTLY LARGER THAN THE DIAMETER OF SAID RODS; FIXING SAID RODS TO A SUPPORT; IMMERSING THE ASSEMBLY OF SAID SUPPORT, RODS AND GRID-LIKE STRUCTURE IN AN ELECTROCHEMICAL BATH; AND APPLYING AN ELECTROCHEMICALLY ACTING VOLTAGE BETWEEN SAID RODS AND SAID GRID-LIKE STRUC-
Claim 2
Independent Claim
76 words
A METHOD FOR MANUFACTURING COLD-EMISSION CATHODES HAVING A PLURALITY OF SUBSTANTIALLY PARALLEL POINT-ENDED METAL RODS, COMPRISING THE STEPS OF: PASSING SAID RODS THROUGH THE MOLES IN A GRID-LIKE STRUCTURE THE DIAMETER OF SAID HOLES BEING SLIGHTLY LARGER THAN THE DIAMETER OF SAID RODS; FIXING SAID RODS TO A SUPPORT; IMMERSING THE ASSEMBLY OF SAID SUPPORT, RODS AND GRID-LIKE STRUCTURE IN AN ELECTROCHEMICAL BATH; AND APPLYING AN ELECTROCHEMICALLY ACTING VOLTAGE BETWEEN SAID RODS AND SAID GRID-LIKE STRUC-
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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |