Patent US4198199A successfully refreshed from Google Patents.
US4198199A
Expired / Lapsed
US
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Lamp with protective coating and method of applying same
Assignee: FLOWIL INTERNATIONAL (HOLDING) BV
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Filing: 1976-12-22
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Granted: 1980-04-15
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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 15:24
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.
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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 |