Patent US3905855A successfully refreshed from Google Patents.
Patent US2923643A successfully refreshed from Google Patents.
US2923643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of anti-corrosive coatings for metals
Assignee: Hunter and Co Paints Ltd
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Filing: 1958-05-29
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Granted: 1960-02-02
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Expires: 1978-05-29
Abstract
No abstract record available.
Inventors
- 👤 Rodwell Robert Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:28
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B2111/00; C04B2111/00474; C04B2111/00482
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN THE PROCESS OF PRODUCING AN ANTI-CORROSIVE COATING ON METALS WHICH COMPRISES APPLYING TO THE METAL SURFACE AT LEAST ONE COATING OF AN AQUEOUS SUSPENSION OF A HYDRATABLE CEMENT, SAID SUSPENSION CONTAINING ZINC CHROMATE OF THE ORDER OF 3%, THE IMPROVEMENT COMPRISING INCORPORATING IN THE SUSPENSION POLYVINYL ACETATE OF THE ORDER OF 2% OF THE WATER EMPLOYED IN THE SLURRY, ALLOWING THE COATING TO DRY AND APPLYING TO THE DRIED COATING AT LEAST ONE COATING SELECTED FROM THE GROUP CONSISTING OF BITUMEN AND SYNTHETIC RESIN IN A SOLVENT VEHICLE.
Claim 2
Dependent Claim
89 words
IN THE PROCESS OF PRODUCING AN ANTI-CORROSIVE COATING ON METALS WHICH COMPRISES APPLYING TO THE METAL SURFACE AT LEAST ONE COATING OF AN AQUEOUS SUSPENSION OF A HYDRATABLE CEMENT, SAID SUSPENSION CONTAINING ZINC CHROMATE OF THE ORDER OF 3%, THE IMPROVEMENT COMPRISING INCORPORATING IN THE SUSPENSION POLYVINYL ACETATE OF THE ORDER OF 2% OF THE WATER EMPLOYED IN THE SLURRY, ALLOWING THE COATING TO DRY AND APPLYING TO THE DRIED COATING AT LEAST ONE COATING SELECTED FROM THE GROUP CONSISTING OF BITUMEN AND SYNTHETIC RESIN IN A SOLVENT VEHICLE.
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) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |