US3083113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc oxide pigments and their production
Assignee: Individual
•
Filing: 1960-04-07
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Granted: 1963-03-26
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Expires: 1980-04-07
Abstract
No abstract record available.
Inventors
- 👤 Korf Christiaan
- 👤 Fritz H W Wachholtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:47
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/04; C09C1/043; C01; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A PROCESS FOR FORMING A ZINC OXIDE PIGMENT PRODUCT OF INCREASED INERTNESS IN COATING COMPOSITIONS WHICH COMPRISES, MIXING ZINC OXIDE PIGMENT WITH AN AQUEOUS ALKALI METAL SILICATE SOLUTION AND WITH AN ACIDIC AGENT IN A QUANTITY REDUCING THE ALKALINITY OF THE SOLUTION TO A PH BETWEEN 7.5 AND 11 AT WHICH THE ZINC OXIDE REACTS WITH SAID ALKALI METAL SILICATE, MAINTAINING THE SOLUTION UNTIL REACTION HAS OCCURRED AND A COATING OF ZONE SILICATE HAS FORMED ON THE SURFACES OF THE PARTICLES IN A QUANTITY CORRESPONDING TO 0.5-20% SIO2 BASED ON THE WEIGHT OF THE DRY PIGMENT, REMOVING RESIDUAL SOLUTION AND DRYING THE COATED PIGMENT FORMED.
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) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |