Patent US3345302A successfully refreshed from Google Patents.
US3345302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable mixtures
Assignee: PQ Corp
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Filing: 1965-07-19
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Granted: 1967-10-03
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Expires: 1985-07-19
Abstract
No abstract record available.
Inventors
- 👤 David I Netting
- 👤 Helmut H Weldes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:23
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/141; C01B33/142; C01B33/143; C02; C02F; C02F1/00; C02F1/72; C04B20/00; C04B20/10; C04B20/1018; C04B20/1029; C04B20/1033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A COMPOSITION CONSISTING ESSENTIALLY OF AN ADMIXTURE OF (A) A FIRST PARTICULATE SOLID ACIDIC COMPOUND MATERIAL THAT IS CAPABLE OF DISSOLVING IN WATER TO FORM AN AQUEOUS ACIDIC SOLUTION, AND (B) A SECOND PARTICULATE MATERIAL CONSISTING ESSENTIALLY OF A SOLUBLE SILICATE THAT IS CAPABLE OF DISSOLVING IN WATER TO FORM AN ALKALINE SOLUTION WITH A PH ABOUT 8; SAID FIRST PARTICULATE MATERIAL BEING COATED WITH FILM; (1) THAT CONSISTS ESSENTIALLY OF AN ALKALI SOLUBLE COPOLYMER RESIN OF MALEIC ANHYDRIDE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYLVINYL ETHERS AND OLEFINS CONTAINING 2-4 CARBON ATOMS, SAID COPOLYMER RESIN BEING 50-70% ESTERIFIED WITH AN ALKANOL HAVING BETWEEN 1 AND 16 CARBON ATOMS, (2) THAT IS BETWEEN ABOUT 1% AND 10% BY WEIGHT OF THE FIRST PARTICULATE MATERIAL, AND (3) THAT IS SUBSTANTIALLY INSOLUBLE IN AQUEOUS SOLUTIONS HAVING A PH LESS THAN 8, (C) THE AMOUNT OF THE FIRST PARTICULATE MATERIAL BEING SUFFICIENT TO NEUTRALIZE THE SECOND PARTICULATE MATERIAL.
Claim 2
Dependent Claim
158 words
A COMPOSITION CONSISTING ESSENTIALLY OF AN ADMIXTURE OF (A) A FIRST PARTICULATE SOLID ACIDIC COMPOUND MATERIAL THAT IS CAPABLE OF DISSOLVING IN WATER TO FORM AN AQUEOUS ACIDIC SOLUTION, AND (B) A SECOND PARTICULATE MATERIAL CONSISTING ESSENTIALLY OF A SOLUBLE SILICATE THAT IS CAPABLE OF DISSOLVING IN WATER TO FORM AN ALKALINE SOLUTION WITH A PH ABOUT 8; SAID FIRST PARTICULATE MATERIAL BEING COATED WITH FILM; (1) THAT CONSISTS ESSENTIALLY OF AN ALKALI SOLUBLE COPOLYMER RESIN OF MALEIC ANHYDRIDE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYLVINYL ETHERS AND OLEFINS CONTAINING 2-4 CARBON ATOMS, SAID COPOLYMER RESIN BEING 50-70% ESTERIFIED WITH AN ALKANOL HAVING BETWEEN 1 AND 16 CARBON ATOMS, (2) THAT IS BETWEEN ABOUT 1% AND 10% BY WEIGHT OF THE FIRST PARTICULATE MATERIAL, AND (3) THAT IS SUBSTANTIALLY INSOLUBLE IN AQUEOUS SOLUTIONS HAVING A PH LESS THAN 8, (C) THE AMOUNT OF THE FIRST PARTICULATE MATERIAL BEING SUFFICIENT TO NEUTRALIZE THE SECOND PARTICULATE MATERIAL.
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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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |