US3158014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoflash lamp
Assignee: GTE Sylvania Inc
•
Filing: 1962-12-28
•
Granted: 1964-11-24
•
Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
- 👤 David Y Brouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:29
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PHOTOFLASH LAMP COMPRISING: A SEALED LIGHT-TRANSMITTING ENVELOPE; A COMBUSTION-SUPPORTING GAS FILLING IN SAID ENVELOP; A QUANTITY OF FILAMENTARY ZIRCONIUM DISPOSED IN SAID ENVELOPE, SAID ZIRCONIUM BEING CHARACTERIZED BY CRYSTAL GRAINS IN THE RANGE OF ABOUT 0.0003" TO ABOUT 0.0006" AVERAGE DIAMETERS; AND IGNITION MEANS DISPOSED IN SAID ENVELOPE IN OPERATIVE RELATIONSHIP WITH RESPECT TO SAID FILAMENTARY ZIRCONIUM.
Claim 2
Dependent Claim
58 words
A PHOTOFLASH LAMP COMPRISING: A SEALED LIGHT-TRANSMITTING ENVELOPE; A COMBUSTION-SUPPORTING GAS FILLING IN SAID ENVELOP; A QUANTITY OF FILAMENTARY ZIRCONIUM DISPOSED IN SAID ENVELOPE, SAID ZIRCONIUM BEING CHARACTERIZED BY CRYSTAL GRAINS IN THE RANGE OF ABOUT 0.0003" TO ABOUT 0.0006" AVERAGE DIAMETERS; AND IGNITION MEANS DISPOSED IN SAID ENVELOPE IN OPERATIVE RELATIONSHIP WITH RESPECT TO SAID FILAMENTARY ZIRCONIUM.
References Cited (Backward Citations)
US2177108A
Cited
US2136234A
Cited
US2254849A
Cited
US2272779A
Cited
US2982119A
Cited
US3114250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |