US3956201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Article of manufacture having thereon a stable reflective coating containing fluorinated aliphatic ring chain addition polymers
Assignee: PPG Industries Inc
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Filing: 1973-06-29
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Granted: 1976-05-11
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Expires: 1993-06-29
Abstract
Abstract Fluorinated aliphatic long chain addition polymers comprised of at least one monomer having at least one fluorine atom attached to a chain carbon atom are used in various environments for their ability to reflect a high percentage of incident light having a wave length in the 2400 to 8000 Angstrom region. These reflectance polymers may be in pressed powder form or in film form and thus are especially applicable as reflectance standards and reflectance coatings particularly in light integrating spheres of spectrophotometers.
Inventors
- 👤 Jerome A. Seiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:22
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08L; C08L27/00; C08L27/02; C08L27/12; C09; C09D; C09D127/00; C09D127/02; C09D127/12; G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/4785; C08J2327/00; C08J2327/02; C08J2327/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
61 words
A film comprising at least one fluorinated long chain addition polymer comprised of at least one monomer having at least one fluorine atom attached to a carbon chain atom, said film being of sufficient thickness and having sufficient discrete microscopic voids therein to reflect more than 90 percent of incident light having a wavelength of from 2400 to 8000 Angstrom units.
Claim 2
Dependent Claim
61 words
A film comprising at least one fluorinated long chain addition polymer comprised of at least one monomer having at least one fluorine atom attached to a carbon chain atom, said film being of sufficient thickness and having sufficient discrete microscopic voids therein to reflect more than 90 percent of incident light having a wavelength of from 2400 to 8000 Angstrom units.
Claim 3
Dependent Claim
15 words
A film according to claim 1 wherein said film is light stable, white and non-pigmented.
Claim 4
Dependent Claim
14 words
A film according to claim 1 wherein said polymer consists essentially of polyvinylidene fluoride.
Claim 5
Dependent Claim
14 words
An article according to claim 1 wherein said film is a light reflectance standard.
Claim 6
Dependent Claim
14 words
A standard according to claim 4 wherein the film consists essentially of polyvinylidene fluoride.
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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |