US3345526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric incandescent lamps
Assignee: Associated Electrical Industries Ltd
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Filing: 1964-03-20
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Granted: 1967-10-03
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Expires: 1984-03-20
Abstract
No abstract record available.
Inventors
- 👤 Wright John Willoughby Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:40
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/42; H01K1/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
AN ELECTRICAL INCANDESCENT LAMP COMPRISING AN ENVELOPE OF VITREOUS MATERIAL, A FLATTENED PINCH SEALING SAID ENVELOPE, TWO FILAMENTS WITHIN THE ENVELOPE, TWO LEAD-IN CONDUCTORS TO EACH FILAMENTS, AN END PORTION OF EACH OF SAID LEAD-IN CONDUCTORS EXTENDING IN SEALED RELATION THROUGH SAID PINCH TO THE EXTERIOR OF THE ENVELOPE AND FORMING AN ELECTRICAL TERMINAL ADJACENT THE OUTER SURFACE OF SAID PINCH, A VITREOUS EXHAUST TUBE PROJECTING INTO SAID ENVELOPE FROM SAID PINCH, A SECOND VITREOUS TUBE ARRANGED IN OVERLAPPED COAXIAL RELATION WITH SAID EXHAUST TUBE, THE FREE ENDS OF SAID TUBES IN THE ENVELOPE FUSED TOGETHER TO PROVIDE AN ENLARGED HEAD PORTION PROJECTING OUTWARDLY OF THE EXHAUST TUBE WITH EACH OF SAID LEAD-IN CONDUCTORS EXTENDING IN SPACED RELATION THROUGH SAID HEAD PORTION.
Claim 2
Dependent Claim
122 words
AN ELECTRICAL INCANDESCENT LAMP COMPRISING AN ENVELOPE OF VITREOUS MATERIAL, A FLATTENED PINCH SEALING SAID ENVELOPE, TWO FILAMENTS WITHIN THE ENVELOPE, TWO LEAD-IN CONDUCTORS TO EACH FILAMENTS, AN END PORTION OF EACH OF SAID LEAD-IN CONDUCTORS EXTENDING IN SEALED RELATION THROUGH SAID PINCH TO THE EXTERIOR OF THE ENVELOPE AND FORMING AN ELECTRICAL TERMINAL ADJACENT THE OUTER SURFACE OF SAID PINCH, A VITREOUS EXHAUST TUBE PROJECTING INTO SAID ENVELOPE FROM SAID PINCH, A SECOND VITREOUS TUBE ARRANGED IN OVERLAPPED COAXIAL RELATION WITH SAID EXHAUST TUBE, THE FREE ENDS OF SAID TUBES IN THE ENVELOPE FUSED TOGETHER TO PROVIDE AN ENLARGED HEAD PORTION PROJECTING OUTWARDLY OF THE EXHAUST TUBE WITH EACH OF SAID LEAD-IN CONDUCTORS EXTENDING IN SPACED RELATION THROUGH SAID HEAD PORTION.
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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |