US2861445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoflash light source
Assignee: General Electric Co
•
Filing: 1957-01-29
•
Granted: 1958-11-25
•
Expires: 1977-01-29
Abstract
No abstract record available.
Inventors
- 👤 Roth Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:36
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A PHOTOFLASH LIGHT SOURCE COMPRISING A SEALED IMPERVIOUS VESSEL, A COMBUSTIBLE LIGHT-PRODUCING CHARGE WITHIN SAID VESSEL, SAID CHARGE COMPRISING A MIXTURE OF IGNITABLE PROPORTIONS OF DIBORANE AND A GASEOUS OXIDE OF NITROGEN, AND MEAN WITHIN SAID ENVELOPE FOR IGNITING SAID CHARGE.,
Claim 2
Dependent Claim
41 words
A PHOTOFLASH LIGHT SOURCE COMPRISING A SEALED IMPERVIOUS VESSEL, A COMBUSTIBLE LIGHT-PRODUCING CHARGE WITHIN SAID VESSEL, SAID CHARGE COMPRISING A MIXTURE OF IGNITABLE PROPORTIONS OF DIBORANE AND A GASEOUS OXIDE OF NITROGEN, AND MEAN WITHIN SAID ENVELOPE FOR IGNITING SAID CHARGE.,
References Cited (Backward Citations)
US1989572A
Cited
US2071369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |