US3330798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum phosphate coated titanium dioxide pigments for melamine and urea formaldehyde resins
Assignee: Bayer AG
•
Filing: 1963-10-15
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Granted: 1967-07-11
•
Expires: 1983-10-15
Abstract
No abstract record available.
Inventors
- 👤 Deissmann Walter
- 👤 Hund Franz
- 👤 Langmesser Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:33
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3607; C09C1/3653; C09C1/3661; C08; C08K; C08K9/00; C08K9/02; C01; C01P; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
IN THE METHOD OF PRODUCING RUTILE PIGMENTS BY A PROCESS INVOLVING ONLY A SINGLE CALCINATION COMPRISING (A) MIXING UNCALCINED TITANIUM DIOXIDE WITH ANOTHER METAL OXIDE OR METAL COMPOUND FORMING AN OXIDE IN STEP (B) SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, ZINC OR ALUMINUM, (B) CALCINING THE MIXTURE AND (C) DEPOSITING FROM ABOUT 0.1 TO ABOUT 10% BY WEIGHT ALUMINUM PHOSPHATE ON THE CALCINED PARTICLES, THE IMPROVEMENT COMPRISING DRYING THE PARTICLES OBTAINED IN STEP (C) AT A TEMPERATURE OF BETWEEN ABOUT 150 TO ABOUT 250*C. TO OBTAIN, IN A SINGLE CALCINATION, PIGMENTS OF INCREASED LIGHT STABILITY IN MELAMINE- AND UREA-FORMALDEHYDE RESINS.
Claim 2
Dependent Claim
104 words
IN THE METHOD OF PRODUCING RUTILE PIGMENTS BY A PROCESS INVOLVING ONLY A SINGLE CALCINATION COMPRISING (A) MIXING UNCALCINED TITANIUM DIOXIDE WITH ANOTHER METAL OXIDE OR METAL COMPOUND FORMING AN OXIDE IN STEP (B) SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, ZINC OR ALUMINUM, (B) CALCINING THE MIXTURE AND (C) DEPOSITING FROM ABOUT 0.1 TO ABOUT 10% BY WEIGHT ALUMINUM PHOSPHATE ON THE CALCINED PARTICLES, THE IMPROVEMENT COMPRISING DRYING THE PARTICLES OBTAINED IN STEP (C) AT A TEMPERATURE OF BETWEEN ABOUT 150 TO ABOUT 250*C. TO OBTAIN, IN A SINGLE CALCINATION, PIGMENTS OF INCREASED LIGHT STABILITY IN MELAMINE- AND UREA-FORMALDEHYDE RESINS.
Claim 3
Dependent Claim
9 words
RUTILE PIGMENTS OBTAINED BY THE PROCESS OF CLAIM 1.
Claim 4
Dependent Claim
12 words
MELAMINE-FORMALDEHYDE RESINS AND UREA-FORMALDEHYDE RESINS CONTAINING THE RUTILE PIGMENTS OF CLAIM 5.
References Cited (Backward Citations)
US2668776A
Cited
US2689162A
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US3169074A
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US3203818A
Cited
US3251705A
Cited
US3141788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |