Patent US2940079A successfully refreshed from Google Patents.
Patent US3242701A successfully refreshed from Google Patents.
US3242701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoflash lamp
Assignee: GTE Sylvania Inc
•
Filing: 1963-12-02
•
Granted: 1966-03-29
•
Expires: 1983-12-02
Abstract
No abstract record available.
Inventors
- 👤 John W Shaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:44
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PHOTOFLASH LAMP COMPRISING: AN HERMETICALLY SEALED, LIGHT-TRANSMITTING ENVELOPE; A SOURCE OF ACTINIC LIGHT CONTAINED WITHIN SAID ENVELOPE; AND A COLOR-CORRECTING FILTER COATING ON SAID ENVELOPE, SAID COATING BEING FORMED FROM A LACQUER SOLUTION INCLUDING A FIRST BLUE DYE EXHIBITING HIGH ABBSORPTIVITY IN THE SPECTRAL BAND FROM ABOUT 660 TO 680 NANOMETERS, A SECOND BLUE DYE EXHIBITING HIGH ABSORPTIVITY N THE SPECTRAL BAND FROM ABOUT 560 TO 650 NANOMETERS, AND A RED DYE EXHIBITING HIGH ABSORPTIVITY IN THE SPECTRAL BAND FROM ABOUT 480 TO 575 NANOMETERS.
Claim 2
Dependent Claim
86 words
A PHOTOFLASH LAMP COMPRISING: AN HERMETICALLY SEALED, LIGHT-TRANSMITTING ENVELOPE; A SOURCE OF ACTINIC LIGHT CONTAINED WITHIN SAID ENVELOPE; AND A COLOR-CORRECTING FILTER COATING ON SAID ENVELOPE, SAID COATING BEING FORMED FROM A LACQUER SOLUTION INCLUDING A FIRST BLUE DYE EXHIBITING HIGH ABBSORPTIVITY IN THE SPECTRAL BAND FROM ABOUT 660 TO 680 NANOMETERS, A SECOND BLUE DYE EXHIBITING HIGH ABSORPTIVITY N THE SPECTRAL BAND FROM ABOUT 560 TO 650 NANOMETERS, AND A RED DYE EXHIBITING HIGH ABSORPTIVITY IN THE SPECTRAL BAND FROM ABOUT 480 TO 575 NANOMETERS.
References Cited (Backward Citations)
US2269984A
Cited
US2305609A
Cited
US2465068A
Cited
US2527010A
Cited
US2599644A
Cited
US3067601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |