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Patent US3976617A successfully refreshed from Google Patents.
US3976617A
Expired / Lapsed
US
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Corrosion inhibiting system containing zinc and zinc phosphate
Assignee: EIDP Inc
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Filing: 1974-06-13
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Granted: 1976-08-24
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Expires: 1994-06-13
Abstract
Abstract A galvanic action corrosion-inhibiting system which comprises particulate zinc and a water-insoluble zinc salt, useful in coating compositions, particularly coating compositions used to coat interiors of water heater tanks.
Inventors
- 👤 Joseph A. Vasta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:01
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/16; C09D5/00; C09D5/08; C09D5/10; C09D5/106; C08; C08L; C08L61/00; C08L61/20; C08L61/30; C08L63/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
In a galvanic action corrosion-inhibiting coating composition suitable for lining the interior surface of a water heater tank, the composition consisting essentially of a. polyvinylidene fluoride, 5-90% by weight of the binder components; b. a condensation product of Bisphenol A or Bisphenol F and epichlorohydrin, 5-90% by weight of the binder components; c. an aminoplast resin, 5-90% by weight of the binder components; d. particulate zinc, 50-900% by weight of the binder components; and e. a liquid carrier; the improvement comprising the presence in the composition of an effective amount of zinc phosphate.
Claim 2
Dependent Claim
93 words
In a galvanic action corrosion-inhibiting coating composition suitable for lining the interior surface of a water heater tank, the composition consisting essentially of a. polyvinylidene fluoride, 5-90% by weight of the binder components; b. a condensation product of Bisphenol A or Bisphenol F and epichlorohydrin, 5-90% by weight of the binder components; c. an aminoplast resin, 5-90% by weight of the binder components; d. particulate zinc, 50-900% by weight of the binder components; and e. a liquid carrier; the improvement comprising the presence in the composition of an effective amount of zinc phosphate.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein the aminoplast resin is a benzoguanamine-formaldehyde resin.
Claim 4
Dependent Claim
21 words
A water heater the interior surface of whose tank is coated with a finish derived from the composition of claim 1.
Claim 5
Dependent Claim
21 words
A water heater the interior surface of whose tank is coated with a finish derived from the composition of claim 2.
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) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |