Patent US5052376A successfully refreshed from Google Patents.
Patent US3860550A successfully refreshed from Google Patents.
US3860550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primer coating composition
Assignee: United States Department of the Navy
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Filing: 1971-05-26
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Granted: 1975-01-14
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Expires: 1991-05-26
Abstract
Abstract Subject disclosure relates to a novel and improved one package primer coating composition which readily adheres to the metal surface to be protected and to the subsequently applied acrylic lacquer topcoat. The ingredients of the improved one package primer composition include strontium or zinc chromate, a magnesium silicous extender, a methyl methacrylate ethyl acrylate copolymer, a methyl methacrylate methyl acrylate copolymer and the solvent, toluene.
Inventors
- 👤 Abe I Falkowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:58
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/16; C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
17 words
The coating composition substantially as described in claim 1 wherein the corrosion inhibiting pigment is zinc chromate.
Claim 2
Dependent Claim
17 words
The coating composition substantially as described in claim 1 wherein the corrosion inhibiting pigment is strontium chromate.
Claim 3
Dependent Claim
19 words
The coating composition substantially as described in claim 1 wherein the magnesium silicous extender is natural fibrous magnesium silicate.
Claim 4
Dependent Claim
40 words
The coating composition substantially as described in claim 1 wherein the magnesium silicous extender is porous silica and magnesium oxide having a Hegeman fineness of 6 1/2 to 7 and a loose bulk density of 9.63 pounds per cubic foot.
References Cited (Backward Citations)
US2940950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |