US3728142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Readily dispersible inorganic pigments
Assignee: Bayer AG
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Filing: 1970-12-28
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Granted: 1973-04-17
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Expires: 1990-12-28
Abstract
Abstract AN INORGANIC PIGMENT SUCH AS TITANIUM DIOXIDE IS RENDERED READILY DISPERSIBLE BY PROVIDING IT WITH A COATING OF AN ALKYD RESIN INCLUUDING RADICALS OF A POLYCARBOXYLIC ACID AND AT LEAST ABOUT 25% BY WEIGHT OF THE RADICALS OF FATTY ACIDS CONTAINING MORE THAN 6 CARBON ATOMS, AND FURTHER INCLUDING RADICALS OF POLYOLS CONTAINING AT LEAST 3 HYDROXYL GROUPS, THE RATIO OF OXYGEN ATOMS TO CARBON ATOMS IN THE POLYOL MOLECULE NOT EXCEEDING 0.7:1
Inventors
- 👤 W Gutsche
- 👤 A Boeckmann
- 👤 K Prater
- 👤 H Rudolph
- 👤 G Trenczek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:48
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C08; C08K; C08K9/00; C08K9/08; C09C3/00; C09C3/006; C09C3/08; C09C3/10; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |