Patent US2692840A successfully refreshed from Google Patents.
US2692840A
Expired / Lapsed
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Single package primary chemical treatment composition
Assignee: Parker Rust Proof Co
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Filing: 1951-11-19
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Granted: 1954-10-26
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Expires: 1971-11-19
Abstract
No abstract record available.
Inventors
- 👤 Ernest P Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:26
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/12; C09D7/00; C09D7/40; C09D7/45; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
59 words
A CHEMICAL COMPOSITION FOR THE PRIMARY TREATMENT OF THE SURFACE OF METALS OF THE GROUP CONSISTING OF STEEL, ZINC AND ALUMINUM CONSISTING ESSENTIALLY OF 2%-16% BASIC ZINC CHROMATE; 2%-16% OF AT LEAST ONE RESIN SELECTED FROM THE GROUP CONSISTING OF POLYVINYL BUTYRAL, ALKYD RESINS AND POLYAMIDE RESINS, A SUITABLE SOLVENT THEREFOR AND 2%-20% OF PHOSPHATE OF THE FOLLOWING STRUCTURE:
Claim 2
Dependent Claim
59 words
A CHEMICAL COMPOSITION FOR THE PRIMARY TREATMENT OF THE SURFACE OF METALS OF THE GROUP CONSISTING OF STEEL, ZINC AND ALUMINUM CONSISTING ESSENTIALLY OF 2%-16% BASIC ZINC CHROMATE; 2%-16% OF AT LEAST ONE RESIN SELECTED FROM THE GROUP CONSISTING OF POLYVINYL BUTYRAL, ALKYD RESINS AND POLYAMIDE RESINS, A SUITABLE SOLVENT THEREFOR AND 2%-20% OF PHOSPHATE OF THE FOLLOWING STRUCTURE:
Claim 3
Independent Claim
125 words
THE METHOD OF FORMING A RELATIVELY THIN COATING AS A PAINT BASE ON A METAL OF THE GROUP CONSISTING OF STEEL, ZINC AND ALUMINUM, SAID METHOD COMPRISING THE STEPS OF CONTACTING THE SURFACE OF SAID METAL WITH 2%-16% BASIC ZINC CHROMATE, 2%-16% OF AT LEAST ONE RESIN SELECTED FROM THE GROUP CONSISTING OF POLYVINYL BUTYRAL, ALKYD RESINS AND POLYAMIDE RESINS, A SUITABLE SOLVENT FOR SAID RESIN AND 2%-20% OF A PHOSPHATE SELECTED FROM THE GROUP CONSISTING OF DIAMMONIUM PHOSPHATE, GUANYLUREA PHOSPHATE, DIMORPHOLINE PHOSPHATE, DITRIMETHYL AMMONIUM PHOSPHATE, SAID COMPOSITION HAVING A PH BETWEEN 6 AND 9, TO FORM A FILM HAVING A THICKNESS BETWEEN 0.1 AND 0.8 MIL BY REACTION BETWEEN THE SAID BASE METAL AND THE SAID COMPOSITION, AND SUBSEQUENTLY DRYING THE REACTION PRODUCT FILM.
Claim 4
Independent Claim
125 words
THE METHOD OF FORMING A RELATIVELY THIN COATING AS A PAINT BASE ON A METAL OF THE GROUP CONSISTING OF STEEL, ZINC AND ALUMINUM, SAID METHOD COMPRISING THE STEPS OF CONTACTING THE SURFACE OF SAID METAL WITH 2%-16% BASIC ZINC CHROMATE, 2%-16% OF AT LEAST ONE RESIN SELECTED FROM THE GROUP CONSISTING OF POLYVINYL BUTYRAL, ALKYD RESINS AND POLYAMIDE RESINS, A SUITABLE SOLVENT FOR SAID RESIN AND 2%-20% OF A PHOSPHATE SELECTED FROM THE GROUP CONSISTING OF DIAMMONIUM PHOSPHATE, GUANYLUREA PHOSPHATE, DIMORPHOLINE PHOSPHATE, DITRIMETHYL AMMONIUM PHOSPHATE, SAID COMPOSITION HAVING A PH BETWEEN 6 AND 9, TO FORM A FILM HAVING A THICKNESS BETWEEN 0.1 AND 0.8 MIL BY REACTION BETWEEN THE SAID BASE METAL AND THE SAID COMPOSITION, AND SUBSEQUENTLY DRYING THE REACTION PRODUCT FILM.
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) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |