US2599644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash lamp
Assignee: Hartford National Bank and Trust Co
•
Filing: 1950-02-28
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Granted: 1952-06-10
•
Expires: 1970-02-28
Abstract
No abstract record available.
Inventors
- 👤 Keukens Hubertus Pieter
- 👤 Verbeek Leo Henricus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:08
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
47 words
A FLASH-LIGHT LAMP COMPRISING A BULB, AN ACTINICALLY REACTING MATERIAL THEREIN, A COLORED LACQUER LAYER ON THE OUTER SURFACE OF SAID BULB AND A COLORED LACQUER LAYER ON THE INNER SURFACE OF SAID BULB, THE COLORS OF SAID LAYERS BEING COMPLEMENTARY SO THAT THE BULB APPEARS COLORLESS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |