Patent US4308186A successfully refreshed from Google Patents.
US4308186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflector coating composition for fluorescent lamps
Assignee: Philips North America LLC
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Filing: 1980-07-07
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Granted: 1981-12-29
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Expires: 2000-07-07
Abstract
Abstract An essentially water-base coating to form reflective films on the inner wall of fluorescent lamps is prepared from a dispersion of TiO 2 in a vehicle comprising a water solution of an organic binder, a volatile organic non-solvent of the binder at room temperature and additions of cationic and nonionic surfactants.
Inventors
- 👤 Willy P. Schreurs
- 👤 Liviu Magian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:22
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/004; C09D171/00; C09D171/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
59 words
A novel composition for a titania coating to be used in laying reflective films in fluorescent lamps said coating consisting of a dispersion of anatase TiO 2 into a vehicle made of a mixture of a water solution of polyoxyethylene binder, a volatile alcohol non-solvent of the polyoxyethylene at room temperature and a combination of cationic and nonionic surfactants.
Claim 2
Dependent Claim
59 words
A novel composition for a titania coating to be used in laying reflective films in fluorescent lamps said coating consisting of a dispersion of anatase TiO 2 into a vehicle made of a mixture of a water solution of polyoxyethylene binder, a volatile alcohol non-solvent of the polyoxyethylene at room temperature and a combination of cationic and nonionic surfactants.
Claim 3
Dependent Claim
46 words
A titania coating according to claim 1 wherein the polyoxyethylene binder has an approximate molecular weight of 300,000 said binder being in the proportions of 2.5 to 3.0 percent of the titania and where the vehicle of the coating contains between 50 and 90 percent methanol.
Claim 4
Dependent Claim
46 words
A titania coating made of a TiO 2 dispersion in a vehicle according to claims 1 or 2 said vehicle comprising 0.5 to 1% by volume of cationic and anionic surfactants and a sufficient amount of acetic acid to obtain a pH between 6.0 and 6.5.
Claim 5
Dependent Claim
20 words
A titania coating according to claims 1 or 2 where the TiO 2 content ranges from 0.3 to 0.4 g/ml.
Claim 6
Dependent Claim
29 words
A reflector film obtained from a coating according to claims 1 or 2 and having a quantity of TiO 2 greater than 3.5 mg TiO 2 per square cm.
Claim 7
Dependent Claim
16 words
A titania coating according to claim 2 wherein the vehicle of the coating contains 75% methanol.
Claim 8
Dependent Claim
15 words
A titania coating according to claim 4 wherein the TiO 2 content is 0.35 g/ml.
Claim 9
Dependent Claim
17 words
A titania coating according to claim 3 wherein said vehicle comprises 0.8% of cationic and anionic surfactants.
Claim 10
Dependent Claim
16 words
A titania coating according to claim 2 wherein said binder is in the proportion of 2.7%.
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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |