Patent US4081698A successfully refreshed from Google Patents.
Patent US3218832A successfully refreshed from Google Patents.
US3218832A
Expired / Lapsed
US
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Photoflash lamp and method
Assignee: Osram GmbH
•
Filing: 1963-09-26
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Granted: 1965-11-23
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Expires: 1983-09-26
Abstract
No abstract record available.
Inventors
- 👤 Seidler Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:33
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A PHOTOFLASH LAMP COMPRISING A GLASS ENVELOPE, A FILLING IN SAID ENVELOPE OF COMBUSTIBLE MATERIAL AND OXYGEN AT A PRESSURE EXCEEDING ONE ATMOSPHERE, AND A SPLINTERPROOF PROTECTIVE COUTING ON THE EXTERIOR SURFACE OF THE GLASS ENVELOPE CONSISTING ESSENTIALLY OF CELLULOSE PROPIONATE.
Claim 2
Dependent Claim
41 words
A PHOTOFLASH LAMP COMPRISING A GLASS ENVELOPE, A FILLING IN SAID ENVELOPE OF COMBUSTIBLE MATERIAL AND OXYGEN AT A PRESSURE EXCEEDING ONE ATMOSPHERE, AND A SPLINTERPROOF PROTECTIVE COUTING ON THE EXTERIOR SURFACE OF THE GLASS ENVELOPE CONSISTING ESSENTIALLY OF CELLULOSE PROPIONATE.
References Cited (Backward Citations)
US2510177A
Cited
US2673162A
Cited
US2868670A
Cited
US2927036A
Cited
US3022653A
Cited
US3068112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |