US3737404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigment compositions containing rutile titania and particulate urea-formaldehyde resin
Assignee: Cabot Corp
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Filing: 1970-05-04
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Granted: 1973-06-05
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Expires: 1990-05-04
Abstract
Abstract IMPROVED AQUEOUS EMULSION TYPE PAINTS AND PIGMENT BASES THEREFOR ARE DESCRIBED INTO WHICH THE PRINCIPAL OPACIFYING PIGMENT IS A RUTILE TITANIA PIGMENT AND THERE IS ALSO INCORPORATED THEREWITH PER 100 PARTS OF SAID RUTILE TITANIA PITMENT BETWEEN ABOUT 2 AND ABOUT 20 PARTS BY WEIGHT OF A SUBSTANTIALLY WATER-INSOLUBLE, HIGH MOLECULAR WEIGHT, CROSS-LINKED UREA-FORMALDEHYDE RESIN IN HIGHLY DISPERSED PARTICULATE FORM. SAID PARTICULATE UREA-FORMALDEHYDE RESIN IS CHARACTERIZED BY A BET SPECIFIC SURFACE AREA OF BETWEEN ABOUT 15 AND ABOUT 100 SQUARE METERS PER GRAM AND PERFERABLY HAS A VOLATILE CONTENT OF NOT OVER ABOUT 15% BY WEIGHT.
Inventors
- 👤 G Berstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:24
CPC Classifications
C; C09; C09D; C09D17/00; C09D17/004; C09D17/007; C09D17/008; C09D161/00; C09D161/20; C09D161/22; C09D161/24; C09D5/00; C09D5/02; C09D5/024; C09D5/028
Claims Analysis
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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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |