US3086136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge tube having heat flow cathode centering member
Assignee: US Philips Corp
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Filing: 1960-03-17
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Granted: 1963-04-16
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Expires: 1980-03-17
Abstract
No abstract record available.
Inventors
- 👤 Almer Friedrich Herman Raymund
- 👤 Almer Raymund
- 👤 Fennema Jan
- 👤 Kuiper Adrianus
- 👤 Santing Hendrik
- 👤 Jan Anton Van Veldhuizen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:55
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J1/00; H01J1/88; H01J1/94; H01J19/50; H01J19/52; H01J19/74; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0005; H01J2893/0009
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
AN ELECTRIC DISCHARGE TUBE COMPRISING AT LEAST ONE ELECTRODE INCLUDING A THERMIONIC CATHODE, AN ELECTRODE CENTERING MEMBER OF INSULATING MATERIAL HAVING A FIRST PORTION ENGAGING THE CATHODE AND A SECOND PORTION IN CONTACT WITH A COOLER PORTION OF THE TUBE, SAID CENTERING MEMBER HAVING A PORTION INTERMEDIATE THE FIRST AND SECOND PORTIONS THEREOF WHICH HAS A SMALLER SECTIONAL AREA THAN THAT OF THE FIRST AND SECOND PORTIONS WHEREBY THE TRANSFER OF HEAT FROM THE FIRST PORTION TO THE SECOND PORTION IS RETARDED AND THE TEMPERATURE DIFFERENCE BETWEEN SAID FIRST PORTION AND THE CATHODE IS MINIMIZED.
Claim 2
Dependent Claim
95 words
AN ELECTRIC DISCHARGE TUBE COMPRISING AT LEAST ONE ELECTRODE INCLUDING A THERMIONIC CATHODE, AN ELECTRODE CENTERING MEMBER OF INSULATING MATERIAL HAVING A FIRST PORTION ENGAGING THE CATHODE AND A SECOND PORTION IN CONTACT WITH A COOLER PORTION OF THE TUBE, SAID CENTERING MEMBER HAVING A PORTION INTERMEDIATE THE FIRST AND SECOND PORTIONS THEREOF WHICH HAS A SMALLER SECTIONAL AREA THAN THAT OF THE FIRST AND SECOND PORTIONS WHEREBY THE TRANSFER OF HEAT FROM THE FIRST PORTION TO THE SECOND PORTION IS RETARDED AND THE TEMPERATURE DIFFERENCE BETWEEN SAID FIRST PORTION AND THE CATHODE IS MINIMIZED.
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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |