US3263852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of glass bulb manufacture and glass bulb
Assignee: General Electric Co
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Filing: 1963-05-09
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Granted: 1966-08-02
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Expires: 1983-05-09
Abstract
No abstract record available.
Inventors
- 👤 Elmer G Fridrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:22
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/04; C03B23/049; C03B23/0493
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
A ONE-PIECE QUARTZ ENVELOPE FOR AN ELECTRIC LAMP COMPRISING A PAIR OF RELATIVELY THIN-WALLED OPPOSED NECK PORTIONS OF QUARTZ TUBING MERGING THROUGH CONSTRICTED THROATS INTO A RELATIVELY THICK-WALLED CENTRAL BULB PORTION, THE WALLS OF SAID BULB PORTION CONSISTING OF A BUILD-UP OF QUARTZ RESULTING FROM THE CONTROLLED NECKING AND UPSET OF TUBING CORRESPONDING TO THE NECK PORTIONS.
Claim 2
Dependent Claim
57 words
A ONE-PIECE QUARTZ ENVELOPE FOR AN ELECTRIC LAMP COMPRISING A PAIR OF RELATIVELY THIN-WALLED OPPOSED NECK PORTIONS OF QUARTZ TUBING MERGING THROUGH CONSTRICTED THROATS INTO A RELATIVELY THICK-WALLED CENTRAL BULB PORTION, THE WALLS OF SAID BULB PORTION CONSISTING OF A BUILD-UP OF QUARTZ RESULTING FROM THE CONTROLLED NECKING AND UPSET OF TUBING CORRESPONDING TO THE NECK PORTIONS.
Claim 3
Independent Claim
136 words
THE METHOD OF MAKING A ONE-PIECE QUARTZ ENVELOPE FOR AN ELECTRIC LAMP WHICH COMPRISES: HEAT-SOFTENING A SHORT SECTION OF RELATIVELY THIN-WALLED QUARTZ TUBING SUCH THAT IT NECKS DOWN TO FORM A THROAT; HEAT-SOFTENING A SHORT SECTION ADJACENT TO THE THROAT IN ORDER TO MAKE IT TEND TO NECK DOWN AND PRESSING THE ENDS OF THE TUBING TOGETHER IN ORDER TO UPSET THE QUARTZ AT THE HEAT-SOFTENED SECTION AND MAKE THE WALL THICKEN AND EXPAND RADIALLY OUTWARD AT SAID SECTION; DISPLACING THE REGION OF HEAT-SOFTENING ALONG THE TUBING WHILE CONTINUING TO PRESS THE TUBING INTO IT IN ORDER TO BUILD UP A RELATIVELY THICK-WALLED BULB PORTION; AND HEAT-SOFTENING A SECTION BEYOND THE BULB PORTION SUCH THAT IT NECKS DOWN TO FORM A THROAT; WHEREBY A THICK-WALLED BULB PORTION RESULTS SEPARATED FROM THIN-WALLED NECK PORTIONS BY CONSTRICTED THROATS.
Claim 4
Independent Claim
136 words
THE METHOD OF MAKING A ONE-PIECE QUARTZ ENVELOPE FOR AN ELECTRIC LAMP WHICH COMPRISES: HEAT-SOFTENING A SHORT SECTION OF RELATIVELY THIN-WALLED QUARTZ TUBING SUCH THAT IT NECKS DOWN TO FORM A THROAT; HEAT-SOFTENING A SHORT SECTION ADJACENT TO THE THROAT IN ORDER TO MAKE IT TEND TO NECK DOWN AND PRESSING THE ENDS OF THE TUBING TOGETHER IN ORDER TO UPSET THE QUARTZ AT THE HEAT-SOFTENED SECTION AND MAKE THE WALL THICKEN AND EXPAND RADIALLY OUTWARD AT SAID SECTION; DISPLACING THE REGION OF HEAT-SOFTENING ALONG THE TUBING WHILE CONTINUING TO PRESS THE TUBING INTO IT IN ORDER TO BUILD UP A RELATIVELY THICK-WALLED BULB PORTION; AND HEAT-SOFTENING A SECTION BEYOND THE BULB PORTION SUCH THAT IT NECKS DOWN TO FORM A THROAT; WHEREBY A THICK-WALLED BULB PORTION RESULTS SEPARATED FROM THIN-WALLED NECK PORTIONS BY CONSTRICTED THROATS.
References Cited (Backward Citations)
US1948560A
Cited
US2218254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |