US3432324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antimony and arsenic compound treatment of tio2 for laminate papers
Assignee: Pigment Chemie GmbH
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Filing: 1966-04-22
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Granted: 1969-03-11
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Expires: 1986-04-22
Abstract
No abstract record available.
Inventors
- 👤 Hans-Joachim Rohrborn
- 👤 Heinrich Clausen
- 👤 Wolfgang Grassmann
- 👤 Gerhard Valet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:59
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; D21H17/69; C; C09; C09C; C09C1/00; C09C1/36; C09C1/3607; C09C1/3653; C09C1/3661; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS FOR PREPARING AN IMPROVED TITANIUM DIOXIDE PIGMENT EXHIBITING HIGH PHOTOCHEMICAL STABILITY IN RESIN-CONTAINING PAPER LAMINATE COMPOSITIONS WHICH COMPRISES PRECIPITATING A COATING OF FROM 0.3 TO 1% OF A WHITE HYDROUS OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF PENTAVALENT ARSENIC AND ANTIMONY ONTO PREVIOUSLY CALCINED PIGMENTARY TITANIUM DIOXIDE PARTICLES BY NEUTRALIZING A SLURRY SUSPENSION OF SAID PIGMENT CONTAINING A HALIDE OF SSID PENTAVALENT METALS, SAID PERCENTAGE AMOUNT BEING BY WEIGHT AND BASED ON THE TITANIUM DIOXIDE PIGMENT, AND WASHING, DRYING AND GRINDING THE COATED PARTICLES.
Claim 2
Dependent Claim
89 words
A PROCESS FOR PREPARING AN IMPROVED TITANIUM DIOXIDE PIGMENT EXHIBITING HIGH PHOTOCHEMICAL STABILITY IN RESIN-CONTAINING PAPER LAMINATE COMPOSITIONS WHICH COMPRISES PRECIPITATING A COATING OF FROM 0.3 TO 1% OF A WHITE HYDROUS OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF PENTAVALENT ARSENIC AND ANTIMONY ONTO PREVIOUSLY CALCINED PIGMENTARY TITANIUM DIOXIDE PARTICLES BY NEUTRALIZING A SLURRY SUSPENSION OF SAID PIGMENT CONTAINING A HALIDE OF SSID PENTAVALENT METALS, SAID PERCENTAGE AMOUNT BEING BY WEIGHT AND BASED ON THE TITANIUM DIOXIDE PIGMENT, AND WASHING, DRYING AND GRINDING THE COATED PARTICLES.
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) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |