US4226646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of coating a ferrous metal substrate with an aqueous fluoropolymer coating
Assignee: EIDP Inc
•
Filing: 1979-03-26
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Granted: 1980-10-07
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Expires: 1999-03-26
Abstract
Abstract Prior to applying aqueous coatings to ferrous metal substrates, triethanolamine is applied. This permits subsequent coating without flash rusting.
Inventors
- 👤 Eustathios Vassiliou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:33
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/08; B05D5/083; B05D2202/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
A process of coating a ferrous metal substrate with an aqeuous fluoropolymer coating with minimum flash rusting wherein the substrate is first coated with triethanolamine in a volatile liquid carrier, then evaporating the carrier, then coating the substrate with an aqueous fluoropolymer coating.
Claim 2
Dependent Claim
43 words
A process of coating a ferrous metal substrate with an aqeuous fluoropolymer coating with minimum flash rusting wherein the substrate is first coated with triethanolamine in a volatile liquid carrier, then evaporating the carrier, then coating the substrate with an aqueous fluoropolymer coating.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein the liquid carrier is isopropanol.
Claim 4
Dependent Claim
24 words
The process of claim 2 wherein the triethanolamine is present in the isopropanol at a concentration of about 4% by weight of the total.
References Cited (Backward Citations)
US2776918A
Cited
US3556968A
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US3506555A
Cited
US3677827A
Cited
US3788961A
Cited
US4039713A
Cited
US4120996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-07 | 1984-04-07 | 1984-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-07 | 1988-04-07 | 1988-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-07 | 1992-04-07 | 1992-10-07 | $7700.00 | Window Closed / Lapsed |