US3243635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic lamp construction
Assignee: General Electric Co
•
Filing: 1962-12-27
•
Granted: 1966-03-29
•
Expires: 1982-12-27
Abstract
No abstract record available.
Inventors
- 👤 William C Louden
- 👤 Richard S Pinter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:15
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/636; C04B35/6365; C04B37/00; C04B37/02; C04B37/023; C04B37/026; H; H01; H01J; H01J17/00; H01J17/02; H01J17/04; H01J5/00; H01J5/32; H01J61/00; H01J61/02; H01J61/36; C04B2235/00; C04B2235/60; C04B2235/604; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2237/00; C04B2237/02; C04B2237/10; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/40; C04B2237/403; C04B2237/50; C04B2237/59; C04B2237/592; C04B2237/70; C04B2237/704; C04B2237/76; C04B2237/765; C04B2237/82; C04B2237/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
AN ALUMINA CERAMIC ELECTRIC DISCHARGE DEVICE COMPRISING A HIGH DENSITY POLYCRYSTALLINE ALUMINA TUBE HAVING END CLOSURES EACH INCLUDING A NIOBIUM THIMBLE HAVING A THIN-WALLED TUBULAR SLEEVE PORTION FORWARD OF AN EXPANDED SHOULDER AND DIMENSIONED TO FIT SNUGLY UPON AXIAL INSERTION INTO THE END OF SAID TUBE UP TO SAID SHOULDER, A THIN ANNULAR LAYER OF GLASSY MATERIAL BETWEEN SAID ALUMINA TUBE AND SAID SLEEVE PORTION AND BONDED TO BOTH, NIOBIUM EXHAUST TUBE PENETRATING SAID THIMBLE AND FASTENED TO A REDUCED DIAMETER REARWARD SLEEVE EXTENSION THEREOF, AN ELECTRODE FASTENED TO THE FORWARD END OF SAID EXHAUST TUBE, AT LEAST ONE OF SAID END CLOSURES HAVING AN APERTURE IN ITS EXHAUST TUBE FORWARD OF THE ATTACHMENT TO THE THIMBLE, SAID APERTURE PROVIDING A PASSAGEWAY INTO SAID ALUMINA TUBE.
Claim 2
Dependent Claim
126 words
AN ALUMINA CERAMIC ELECTRIC DISCHARGE DEVICE COMPRISING A HIGH DENSITY POLYCRYSTALLINE ALUMINA TUBE HAVING END CLOSURES EACH INCLUDING A NIOBIUM THIMBLE HAVING A THIN-WALLED TUBULAR SLEEVE PORTION FORWARD OF AN EXPANDED SHOULDER AND DIMENSIONED TO FIT SNUGLY UPON AXIAL INSERTION INTO THE END OF SAID TUBE UP TO SAID SHOULDER, A THIN ANNULAR LAYER OF GLASSY MATERIAL BETWEEN SAID ALUMINA TUBE AND SAID SLEEVE PORTION AND BONDED TO BOTH, NIOBIUM EXHAUST TUBE PENETRATING SAID THIMBLE AND FASTENED TO A REDUCED DIAMETER REARWARD SLEEVE EXTENSION THEREOF, AN ELECTRODE FASTENED TO THE FORWARD END OF SAID EXHAUST TUBE, AT LEAST ONE OF SAID END CLOSURES HAVING AN APERTURE IN ITS EXHAUST TUBE FORWARD OF THE ATTACHMENT TO THE THIMBLE, SAID APERTURE PROVIDING A PASSAGEWAY INTO SAID ALUMINA TUBE.
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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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |