US3130061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic coating composition
Assignee: American Pipe and Construction Co
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Filing: 1961-02-06
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Granted: 1964-04-21
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Expires: 1981-02-06
Abstract
No abstract record available.
Inventors
- 👤 Walter M Mcmahon
- 👤 Charles G Abba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:11
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
AN INORGANIC PROTECTIVE COATING COMPOSITION FOR METAL SURFACES WHICH IS SELF-CURING AT ROOM TEMPERATURE CONSISTING ESSENTIALLY OF WATER AS A DISPERSING MEDIUM AND A FILM-FORMING BINDER CONSISTING OF LITHIUM HYDROXIDE AND ALKALI STABILIZED COLLOIDAL SILICA HAVING A PARTICLE SIZE OF ABOUT 1 TO ABOUT 100 MILLIMICRONS, THE MOLAR RATIO OF LITHIUM HYDROXIDE EXPRESSED AS LITHIUM OXIDE TO COLLOIDAL SILICA, ON A DRY WEIGHT BASIS, BEING ABOUT 1:40 UP TO ABOUT 1:2.5 AND FROM ABOUT 1 PART UP TO ABOUT 25 PARTS OF A FINELY DIVIDED METAL PIGMENT PER PART OF SAID BINDER, SAID PIGMENT BEING REACTIVE WITH SAID BINDER AND SELECTED FROM THE GROUP CONSISTING OF ZINC DUST, POWDERED LEAD AND ALUMINUM FLAKE, THERE BEING PRESENT FROM ABOUT 0.3% TO ABOUT 4% BY WEIGHT OF ALKALI AS NA2O AND K2O IN SAID STABILIZED COLLOIDAL SILICA, THE PROPORTION BY WEIGHT OF SAID REACTIVE PIGMENT TO SAID FILM-FORMING BINDER BEING AT LEAST 1:1 FOR THE LIGHTEST DENSITY REACTIVE PIGMENT AND VARYING UP TO A MAXIMUM OF ABOUT 25:1.
Claim 2
Dependent Claim
166 words
AN INORGANIC PROTECTIVE COATING COMPOSITION FOR METAL SURFACES WHICH IS SELF-CURING AT ROOM TEMPERATURE CONSISTING ESSENTIALLY OF WATER AS A DISPERSING MEDIUM AND A FILM-FORMING BINDER CONSISTING OF LITHIUM HYDROXIDE AND ALKALI STABILIZED COLLOIDAL SILICA HAVING A PARTICLE SIZE OF ABOUT 1 TO ABOUT 100 MILLIMICRONS, THE MOLAR RATIO OF LITHIUM HYDROXIDE EXPRESSED AS LITHIUM OXIDE TO COLLOIDAL SILICA, ON A DRY WEIGHT BASIS, BEING ABOUT 1:40 UP TO ABOUT 1:2.5 AND FROM ABOUT 1 PART UP TO ABOUT 25 PARTS OF A FINELY DIVIDED METAL PIGMENT PER PART OF SAID BINDER, SAID PIGMENT BEING REACTIVE WITH SAID BINDER AND SELECTED FROM THE GROUP CONSISTING OF ZINC DUST, POWDERED LEAD AND ALUMINUM FLAKE, THERE BEING PRESENT FROM ABOUT 0.3% TO ABOUT 4% BY WEIGHT OF ALKALI AS NA2O AND K2O IN SAID STABILIZED COLLOIDAL SILICA, THE PROPORTION BY WEIGHT OF SAID REACTIVE PIGMENT TO SAID FILM-FORMING BINDER BEING AT LEAST 1:1 FOR THE LIGHTEST DENSITY REACTIVE PIGMENT AND VARYING UP TO A MAXIMUM OF ABOUT 25:1.
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |