Patent US3247313A successfully refreshed from Google Patents.
US3247313A
Expired / Lapsed
US
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Electrical insulator
Assignee: US Philips Corp
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Filing: 1963-12-04
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Granted: 1966-04-19
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Expires: 1983-12-04
Abstract
No abstract record available.
Inventors
- 👤 Eduard G Dorgelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:10
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/08; C; C03; C03C; C03C27/00; C03C27/02; Y; Y10; Y10S; Y10S228/00; Y10S228/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
AN ENVELOPE FOR AN ELECTRIC DISCHARGE TUBE HAVING A PORTION THROUGH WHICH ELECTRICALLY CONDUCTIVE ELEMENTS EXTEND SPACED BY ELECTRICALLY INSULATING ZONES, SAID ENVELOPE PORTION COMPRISING A FIRST PART WHICH EXTENDS BETWEEN AND IMMEDIATELY SURROUNDS THE CONDUCTIVE ELEMENTS AND CONSISTS OF A GLASS HAVING A POWER FACTOR OF LESS THAN 20 X 10-4, AND A SECOND PART IMMEDIATELY ABUTTING SAID FIRST PART AND SPACED FROM SAID CONDUCTIVE ELEMENTS CONSISTING OF A GLASS HAVING A POWER FACTOR EXCEEDING 20 X 10-4, SAID SECOND PART HAVING A LOWER MELTING POINT THAN THAT OF THE GLASS OF THE FIRST PART TO FACILITATE SEALING THEREOF TO REMAINING PORTIONS OF THE ENVELOPE.
Claim 2
Dependent Claim
106 words
AN ENVELOPE FOR AN ELECTRIC DISCHARGE TUBE HAVING A PORTION THROUGH WHICH ELECTRICALLY CONDUCTIVE ELEMENTS EXTEND SPACED BY ELECTRICALLY INSULATING ZONES, SAID ENVELOPE PORTION COMPRISING A FIRST PART WHICH EXTENDS BETWEEN AND IMMEDIATELY SURROUNDS THE CONDUCTIVE ELEMENTS AND CONSISTS OF A GLASS HAVING A POWER FACTOR OF LESS THAN 20 X 10-4, AND A SECOND PART IMMEDIATELY ABUTTING SAID FIRST PART AND SPACED FROM SAID CONDUCTIVE ELEMENTS CONSISTING OF A GLASS HAVING A POWER FACTOR EXCEEDING 20 X 10-4, SAID SECOND PART HAVING A LOWER MELTING POINT THAN THAT OF THE GLASS OF THE FIRST PART TO FACILITATE SEALING THEREOF TO REMAINING PORTIONS OF THE ENVELOPE.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |