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Patent US3821014A successfully refreshed from Google Patents.
US3821014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate coated polymeric shaped objects
Assignee: EIDP Inc
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Filing: 1972-07-19
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Granted: 1974-06-28
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Expires: 1992-07-19
Abstract
Abstract Organic polymeric shaped objects, such as films, coated with a substantially continuous, gas-impermeable coating of aluminum and/or ferric orthophosphate of a specific atom ratio, and a process for their preparation using colloids or solutions of the coating material.
Inventors
- 👤 V Haskell
- 👤 J Hecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:40
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; B05D7/04; C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/37; C01B25/375; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/0423; C08J7/043; C08J7/046; C08J7/048; C08J7/052; B05D3/00; B05D3/10; B05D3/101; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31855; Y10T428/31859; Y10T428/31862; Y10T428/3187; Y10T428/31873; Y10T428/31935
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
27 words
An article of claim 1 wherein the coating consists essentially of aluminum orthophosphate and the atom ratio of aluminum to phosphorus is about from 1.3 to 0.8.
Claim 2
Dependent Claim
25 words
An article of claim 1 wherein at least one surface of the film is flame treated prior to the application of the aluminum orthophosphate coating.
Claim 3
Dependent Claim
27 words
An article of claim 1 wherein at least one surface of the film is treated by electrical discharge prior to the application of the aluminum orthophosphate coating.
Claim 4
Dependent Claim
25 words
An article of claim 1 wherein the coating further comprises up to about 30 percent, by weight of the aluminum orthophosphate, of adhesion promoting additive.
Claim 5
Dependent Claim
23 words
An article of claim 5 wherein the adhesion promoting additive is selected from melamine formaldehyde resins, urea formaldehyde resins, polyethylenimine, glycine and alanine.
Claim 6
Dependent Claim
19 words
An article of claim 1 further comprising a sealable topcoat on at least one coated surface of the film.
Claim 7
Dependent Claim
17 words
An article of claim 7 wherein the sealable surface topcoat is applied to the aluminum orthophosphate surface.
Claim 8
Dependent Claim
76 words
A biaxially oriented polyethylene terephthalate film having been treated with electrical discharge to promote adhesion, having a substantially continuous, gas-impermeable coating on at least one surface thereof comprising aluminum orthophosphate in which the ratio of aluminum to phosphorus is about from 1.3 to 0.8, the coating further comprising about from 5 to 20 percent by weight of adhesion promoting additive, the film further comprising a polyvinylidene chloride topcoat on the surface of the aluminum orthophosphate coating.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |