Patent US3228216A successfully refreshed from Google Patents.
US3228216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoflash lamp
Assignee: GTE Sylvania Inc
•
Filing: 1963-05-29
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Granted: 1966-01-11
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Expires: 1983-05-29
Abstract
No abstract record available.
Inventors
- 👤 Eugene W Desaulniers
- 👤 Lester F Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:09
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PHOTOFLASH LAMP COMPRISING: A SEALED, LIGHT-TRANSMITTING ENVELOPE; A COMBUSTION-SUPPORTING GAS FILLING IN SAID ENVELOPE AT A PRESSURE ABOVE ATMOSPHERIC; TWO SEPARATE CHARGES OF FILAMENTARY ZIRCONIUM DISPOSED IN SAID ENVELOPE; IGNITION MEANS DISPOSED IN SAID ENVELOPE IN OPERATIVE RELATIONSHIP WITH ERSPECT TO ONE OF SAID CHARGES OF FILAMENTARY ZIRCONIUM, AND A SEPARATOR OF INERT MATERIAL DISPOSES WITHIN SAID ENVELOPE BETWEEN SAID TWO CHARGES OF FILAMENTARY ZIRCONIUM AND SPACED FROM THE INSIDE WALL OF SAID ENVELOPE.
Claim 2
Dependent Claim
75 words
A PHOTOFLASH LAMP COMPRISING: A SEALED, LIGHT-TRANSMITTING ENVELOPE; A COMBUSTION-SUPPORTING GAS FILLING IN SAID ENVELOPE AT A PRESSURE ABOVE ATMOSPHERIC; TWO SEPARATE CHARGES OF FILAMENTARY ZIRCONIUM DISPOSED IN SAID ENVELOPE; IGNITION MEANS DISPOSED IN SAID ENVELOPE IN OPERATIVE RELATIONSHIP WITH ERSPECT TO ONE OF SAID CHARGES OF FILAMENTARY ZIRCONIUM, AND A SEPARATOR OF INERT MATERIAL DISPOSES WITHIN SAID ENVELOPE BETWEEN SAID TWO CHARGES OF FILAMENTARY ZIRCONIUM AND SPACED FROM THE INSIDE WALL OF SAID ENVELOPE.
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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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |