US3262814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating an indirectly heated cathode
Assignee: US Philips Corp
•
Filing: 1961-12-14
•
Granted: 1966-07-26
•
Expires: 1981-12-14
Abstract
No abstract record available.
Inventors
- 👤 Provisor Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:57
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/26; H01J9/00; H01J9/02; H01J9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD OF MANUFACTURING A INDIRECTLY HEATED CATHODE INCLUDING A HEATING ELEMENT, A NICKEL SUPPORTING BODY IN HEAT-TRANSFER RELATIONSHIP TO THE HEATING ELEMENT THE SURFACE OF WHICH FACING THE HEARING ELEMENT BEING COVERED WITH A BLACK LAYER, AND AN EMISSIVE LAYER OF A SURFACE OF THE SUPPORTING BODY ON A SIDE THEREOF REMOTE FROM THE HEATING ELEMENT, WHICH COMPRISES THE STEPS, FORMING ON THE SURFACE OF SAID SUPPORTING BODY FACING THE HEATING ELEMENT A LAYER OF FINELY DIVIDED ALUMINUM AND NICKEL OXIDE, HETING THE SO-COVERED SUPPORTING BODY TO A TEMPERATURE OF AT LEAST 590*C. IN A VACUUM TO FORM A GREY-BLACK INTERMETALLIC LAYER, AND HEATIING THE BODY
Claim 2
Independent Claim
107 words
A METHOD OF MANUFACTURING A INDIRECTLY HEATED CATHODE INCLUDING A HEATING ELEMENT, A NICKEL SUPPORTING BODY IN HEAT-TRANSFER RELATIONSHIP TO THE HEATING ELEMENT THE SURFACE OF WHICH FACING THE HEARING ELEMENT BEING COVERED WITH A BLACK LAYER, AND AN EMISSIVE LAYER OF A SURFACE OF THE SUPPORTING BODY ON A SIDE THEREOF REMOTE FROM THE HEATING ELEMENT, WHICH COMPRISES THE STEPS, FORMING ON THE SURFACE OF SAID SUPPORTING BODY FACING THE HEATING ELEMENT A LAYER OF FINELY DIVIDED ALUMINUM AND NICKEL OXIDE, HETING THE SO-COVERED SUPPORTING BODY TO A TEMPERATURE OF AT LEAST 590*C. IN A VACUUM TO FORM A GREY-BLACK INTERMETALLIC LAYER, AND HEATIING THE BODY
References Cited (Backward Citations)
US2740726A
Cited
US2723363A
Cited
US2817572A
Cited
US2891879A
Cited
US2949557A
Cited
US2987423A
Cited
US3068337A
Cited
US3056061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |