US4198199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp with protective coating and method of applying same
Assignee: FLOWIL INTERNATIONAL (HOLDING) BV
•
Filing: 1976-12-22
•
Granted: 1980-04-15
•
Expires: 1996-12-22
Abstract
Abstract A photoflash lamp having a glass envelope with a clear protective exterior coating comprising a photopolymer. In applying the coating, the lamp is dipped in a liquid photopolymer and then cure-hardened by a short period of irradiation with a source of ultraviolet light.
Inventors
- 👤 Judith A. Dow
- 👤 Thomas J. Sentementes
- 👤 Horace H. Homer
- 👤 John W. Shaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:31
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
61 words
A lamp having a light-transmitting envelope and an optically clear protective coating formed in situ on the exterior surface of said envelope for significantly enhancing the containment thereof, said coating comprising a single layer of a solvent-free photopolymer having a thickness of at least about 0.020 inch, said photopolymer comprising a UV curable synthetic polymer containing an organic photoinitiator or photosensitizer.
Claim 2
Dependent Claim
61 words
A lamp having a light-transmitting envelope and an optically clear protective coating formed in situ on the exterior surface of said envelope for significantly enhancing the containment thereof, said coating comprising a single layer of a solvent-free photopolymer having a thickness of at least about 0.020 inch, said photopolymer comprising a UV curable synthetic polymer containing an organic photoinitiator or photosensitizer.
Claim 3
Dependent Claim
16 words
The lamp of claim 1 wherein the envelope thereof contains a source of actinic light output.
Claim 4
Dependent Claim
19 words
The lamp of claim 2 wherein the envelope thereof contains a fill gas at a pressure exceeding one atmosphere.
Claim 5
Dependent Claim
57 words
The lamp of claim 3 wherein said lamp is a photoflash lamp, said envelope is an hermetically sealed glass envelope, said fill gas is a combustion-supporting gas, and said lamp further includes a quantity of combustible material located in said envelope, and ignition means attached to said envelope and disposed in operative relationship to said combustible material.
References Cited (Backward Citations)
US2438993A
Cited
US3554887A
Cited
US4008341A
Cited
US3893797A
Cited
US3832125A
Cited
US3959525A
Cited
US3961099A
Cited
US4017652A
Cited
US4017652B1
Cited
US3947224A
Cited
US3992276A
Cited
US4076489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |