US3022653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated flashlamp and coating composition
Assignee: Westinghouse Electric Corp
•
Filing: 1958-12-24
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Granted: 1962-02-27
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Expires: 1978-12-24
Abstract
No abstract record available.
Inventors
- 👤 Norman F Baird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:39
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A FLASH LAMP HAVING AN ENVELOPE, A SINGLE-LAYER PROTECTIVE COATING ON THE EXTERIOR SURFACE OF SAID ENVELOPE, SAID COATING COMPRISING A MIXTURE OF FROM 257% TO 50% BY WEIGHT OF CELLULOSE ACETATE HAVING A VISCOSITY OF FROM 17 TO 24 SECONDS, AND FROM 75% TO 50% BY WEIGHT OF CELLULOSE ACETATE HAVING A VISCOSITY OF FROM 6 TO 10 SECONDS, AND SAID COATING HAVING A THICKNESS OF AT LEAST ABOUT 4 MILS.
Claim 2
Dependent Claim
72 words
A FLASH LAMP HAVING AN ENVELOPE, A SINGLE-LAYER PROTECTIVE COATING ON THE EXTERIOR SURFACE OF SAID ENVELOPE, SAID COATING COMPRISING A MIXTURE OF FROM 257% TO 50% BY WEIGHT OF CELLULOSE ACETATE HAVING A VISCOSITY OF FROM 17 TO 24 SECONDS, AND FROM 75% TO 50% BY WEIGHT OF CELLULOSE ACETATE HAVING A VISCOSITY OF FROM 6 TO 10 SECONDS, AND SAID COATING HAVING A THICKNESS OF AT LEAST ABOUT 4 MILS.
References Cited (Backward Citations)
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Cited
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US2739069A
Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |