Patent DE624155C successfully refreshed from Google Patents.
Patent US3045460A successfully refreshed from Google Patents.
US3045460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoflash lamp
Assignee: GTE Sylvania Inc
•
Filing: 1960-04-27
•
Granted: 1962-07-24
•
Expires: 1980-04-27
Abstract
No abstract record available.
Inventors
- 👤 David Y Brouse
- 👤 Jr Eugene W Desaulniers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:59
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 QUANTITY OF FILAMENTARY ZIRCONIUM IN SAID ENVELOPE; IGNITION MEANS DISPOSED IN SAID ENVELOPE IN OPERATIVE RELATIONSHIP WITH RESPECT TO SAID FILAMENTARY ZIRCONIUM; AND A GAS FILLING IN SAID ENVELOPE AT A PRESSURE ABOVE ATMOSPHERIC, SAID GAS FILLING COMPRISING OXYGEN AND ABOUT 1% TO ABOUT 10% BY VOLUME OF NITROGEN.
Claim 2
Dependent Claim
58 words
A PHOTOFLASH LAMP COMPRISING: A SEALED LIGHT-TRANSMITTING ENVELOPE; A QUANTITY OF FILAMENTARY ZIRCONIUM IN SAID ENVELOPE; IGNITION MEANS DISPOSED IN SAID ENVELOPE IN OPERATIVE RELATIONSHIP WITH RESPECT TO SAID FILAMENTARY ZIRCONIUM; AND A GAS FILLING IN SAID ENVELOPE AT A PRESSURE ABOVE ATMOSPHERIC, SAID GAS FILLING COMPRISING OXYGEN AND ABOUT 1% TO ABOUT 10% BY VOLUME OF NITROGEN.
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) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |