Patent DE920641C successfully refreshed from Google Patents.
Patent US3073986A successfully refreshed from Google Patents.
US3073986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric incandescent lamp
Assignee: General Electric Co
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Filing: 1960-04-20
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Granted: 1963-01-15
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Expires: 1980-04-20
Abstract
No abstract record available.
Inventors
- 👤 William F Hodge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:42
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/18; H01K1/24; H01K1/02; H01K1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
AN ELONGATED DOUBLE-END INCANDESCENT ELECTRIC LAMP COMPRISING A TUBULAR ENVELOPE OF VITREOUS MATERIAL, LEAD-IN CONDUCTORS SEALED THROUGH OPPOSITE ENDS OF SAID ENVELOPE, AND A HELICALLY COILED FILAMENT EXTENDING AXIALLY OF SAID ENVELOPE AND ANCHORED AT ITS ENDS TO RESPECTIVE LEAD-IN WIRES, WHEREIN SAID FILAMENT IS COMPOSED OF A PLURALITY OF HELICAL WIRE COILS IN COAXIAL RELATIONSHIP AND CONNECTED BETWEEN SAID LEAD-IN CONDUCTORS IN PARALLEL ELECTRICAL RELATION AND UNDER SUFFICIENT TENSION TO AVOID BUCKLING UPON EXPANSION THEREOF WHEN HEATED TO INCANDESCENCE, SAID FILAMENT BEING PROPORTIONED TO DISSIPATE AT LEAST 100 WATTS PER INCH OF LIGHTED LENGTH AT AN APPLIED VOLTAGE NOT EXCEEDING ABOUT 12 VOLTS PER INCH WITH A COLOR TEMPERATURE OF AT LEAST ABOUT 2400* K., WHEREBY THE LAMP HAS A COMPARATIVELY LONG LIGHTED LENGTH AND HIGH WATTAGE DISSIPATION AT RELATIVELY LOW VOLTAGE FOR THE STATED COLOR TEMPERATURE AND THE FILAMENT HAS SUFFICIENT RESILIENCE THAT, WITHOUT EXCEEDING ITS ELASTIC LIMIT, IT IS UNDER SUFFICIENT TENSION TO AVOID BUCKLING WHEN HEATED TO ITS OPERATING TEMPERATURE.
Claim 2
Dependent Claim
164 words
AN ELONGATED DOUBLE-END INCANDESCENT ELECTRIC LAMP COMPRISING A TUBULAR ENVELOPE OF VITREOUS MATERIAL, LEAD-IN CONDUCTORS SEALED THROUGH OPPOSITE ENDS OF SAID ENVELOPE, AND A HELICALLY COILED FILAMENT EXTENDING AXIALLY OF SAID ENVELOPE AND ANCHORED AT ITS ENDS TO RESPECTIVE LEAD-IN WIRES, WHEREIN SAID FILAMENT IS COMPOSED OF A PLURALITY OF HELICAL WIRE COILS IN COAXIAL RELATIONSHIP AND CONNECTED BETWEEN SAID LEAD-IN CONDUCTORS IN PARALLEL ELECTRICAL RELATION AND UNDER SUFFICIENT TENSION TO AVOID BUCKLING UPON EXPANSION THEREOF WHEN HEATED TO INCANDESCENCE, SAID FILAMENT BEING PROPORTIONED TO DISSIPATE AT LEAST 100 WATTS PER INCH OF LIGHTED LENGTH AT AN APPLIED VOLTAGE NOT EXCEEDING ABOUT 12 VOLTS PER INCH WITH A COLOR TEMPERATURE OF AT LEAST ABOUT 2400* K., WHEREBY THE LAMP HAS A COMPARATIVELY LONG LIGHTED LENGTH AND HIGH WATTAGE DISSIPATION AT RELATIVELY LOW VOLTAGE FOR THE STATED COLOR TEMPERATURE AND THE FILAMENT HAS SUFFICIENT RESILIENCE THAT, WITHOUT EXCEEDING ITS ELASTIC LIMIT, IT IS UNDER SUFFICIENT TENSION TO AVOID BUCKLING WHEN HEATED TO ITS OPERATING TEMPERATURE.
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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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |