US3020224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for applying electron-emissive coatings to coating-supports of indirectly heated thermionic cathodes of electric discharge tubes
Assignee: US Philips Corp
•
Filing: 1958-04-24
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Granted: 1962-02-06
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Expires: 1978-04-24
Abstract
No abstract record available.
Inventors
- 👤 Blank Hans Hinrich
- 👤 Pieter Geert Van Zanten
- 👤 Kuiper Adrianus
- 👤 Almer Friedrich Herman Raymund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:25
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A METHOD OF APPLYING A COATING OF EMISSIVE MATERIAL ONTO A SUPPORT FOR MAKING A CATHODE, COMPRISING THE STEPS OF ROTATING A COATING ROLLER IN ONE DIRECTION IN CONTACT WITH A SUPPLY OF PASTE-LIKE EMISSIVE MATERIAL THEREBY FORMING A FLIM OF SAID MATERIAL ON THE COATING ROLLER, ROTAING THE CATHODE SUPPORT IN THE OPPOSITE DIRECTION IN CONTACT WITH THE EMISSIVE MATERIAL FLIM TO TRANSFER EMISSIVE MATERIAL ONTO THE SUPPORT, MAINTAINING A POTENTIAL DIFFERENCE BETWEEN THE CATHODE SUPPORT AND COATING ROLLER WITH THE ROLLER POSITIVE, WHEREBY CATAPHOTIC DEPOSITION OCCURS ARI-STRIPPING THE EMISSIVE MATERIAL FLIM FROM THE COATING ROLLER TO TERMINATE THE MATERIAL-TRANSFERRING PROCESS WHILE THE ROLLER AND SUPPORT CONTINUE TO ROTATE AND DRYING THE COATING ON THE SUPPORT WHILE IT ROTATES.
Claim 2
Dependent Claim
141 words
APPARATUS FOR COATING A SUPPORT WITH EMISSIVE MATERIAL TO FORM A CATHODE COMPRISING A VESSEL FOR HOLDING A SUPPLY OF PASTE-LIKE EMISSIVE MATERIAL A COATING ROLLER WHOSE SURFACE CONTACTS THE SUPPLY OF EMISSIVE MATERIAL AND MEANS FOR ROTATING THE COATING ROLLER IN ONR DIRECTION WHEREBY A FLIM OF EMISSIVE MATERIAL IS ESTABLISHED ON THE ROLLER MEANS FOR SUPPORTING AND ROTAING THE CATHODE SUPPORT IN THE OPPOSITE DIRECTION IN CONTACT WITH THE FLIM OF EMISSIVE MATERIAL ON THE SUPPORT THEREBY OT TRANSFER MATERIAL ONTO THE SUPPORT, MEANS FOR MAINTAINING THE COATING ROLLER AT A POSITIVE POTENTIAL RELATIVE TO THE SUPPORT SO THAT CATAPHORETIC DEPOSITION OCCURS, AND MEANS LOCATED BETWEEN THE VESSEL AND THE SUPPORT ON THE SIDE OF THE ROLLER TRAVELLING TOWARD THE SUPPORT FOR AIR STRIPPING THE FLIM OF EMISSIVE MATERIAL FROM THE COATING ROLLER THEREBY TO TERMINATE THE MATERIAL-TRANSFERING OPERATION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |