Patent US3791850A successfully refreshed from Google Patents.
US3791850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formable, weldable coated article of manufacture
Assignee: Monsanto Co
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Filing: 1971-08-30
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Granted: 1974-02-12
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Expires: 1991-08-30
Abstract
Abstract Disclosed herein are formable, weldable articles of manufacture comprising a metal sheet coated with a first coating of metal phosphate and a second coating comprising a blend of polyvinyl butyral and phenolic resins in at least one non-corrosive organic solvent which is a solvent for each component of the resin blend having dispersed therein a basic zinc chromate and a particular atomized aluminum powder.
Inventors
- 👤 R Deshay
- 👤 R Isaksen
- 👤 A Sahni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:49
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/16; B23K11/163; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/26; Y10T428/27; Y10T428/273; Y10T428/31504; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
54 words
The article of manufacture of claim 1 wherein the polyvinyl butyral resin in the second coating has a polyvinyl alcohol content of from about 5 to about 30 percent by weight, a residual polyvinyl acetate content of less than 10 percent by weight and a weight average molecular weight of from 30,000 to 270,000.
Claim 2
Dependent Claim
21 words
about 20 to about 50 percent by weight of a phenolic resole resin based on the weight of the total resin,
Claim 3
Dependent Claim
22 words
about 0 to about 30 percent by weight of a basic zinc chromate based on the weight of the total resin, and,
Claim 4
Dependent Claim
35 words
The article of manufacture of claim 1, wherein the atomized aluminum powder has an average particle size of about 10 microns with a particle size distribution of from about 5 microns to about 20 microns.
Claim 5
Dependent Claim
16 words
The article of manufacture of claim 1 wherein the metal sheet is a ferrous metal sheet.
Claim 6
Dependent Claim
24 words
about 30 to about 60 percent by volume concentration of an atomized aluminum powder based on the dry film volume of the second coating.
Claim 7
Dependent Claim
14 words
The article of manufacture of claim 4 wherein the coated metal sheet is spot-weldable.
Claim 8
Dependent Claim
32 words
The article of manufacture of claim 4 having a T bend capability of 1 to 2T, a reverse impact of at least 160 inch pounds and a pencil hardness less than 3H.
Claim 9
Dependent Claim
25 words
The article of manufacture of claim 1 wherein the first coating is iron phosphate in amounts ranging from about 15 mg./sq.ft. to about 50 mg./sq.ft.
Claim 10
Dependent Claim
24 words
The article of manufacture of claim 1 wherein the second coating has been cured at a temperature in the range of 350* to 450*F.
Claim 11
Dependent Claim
22 words
ThE article of manufacture of claim 1 wherein the second coating has a thickness in the range of 0.3 to 0.7. mil.
References Cited (Backward Citations)
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |