Patent US3689445A successfully refreshed from Google Patents.
US3689445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thickened aqueous latices
Assignee: Dulux Australia Ltd
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Filing: 1968-12-16
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Granted: 1972-09-05
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Expires: 1988-12-16
Abstract
Abstract THICKENED AQUIEOUS LATICES OF 0.4 TO 2.0 MICON AVERAGE DISPERSE POLYMER PARTICLE DIAMETER AND COMPRISING 0.1 TO 10.0% BY WEIGHT OF THE POLYMER PARTICLES OF A OLYMERIC THICKENER OF MOLECULAR WEIGHT 10,000 TO 300,000 ARE DISCLOSED. THE THICKENER CONSISTS OF A CHAIN- LIKE COPOLYMER OF VINYL ALCOHOL AND AT LEAST ONE CO-MONOMER CONTAINING 4 TO 18 CARBON ATOMS WHEREOF A HOMOPOLYMER IS INSOLUBLE IN THE AQUEOUS LIQUID AND IN WHICH THE PROPORTION OF COMONOMER BEARS A SPECIFIC RELATIONSHIP TO THE NUMBER OF CARBON ATOMS IT CONTAINS. IN A PARTICULAR EMBODIMENT A PROCESS IS PROVIDED OF PREPARING THICKENED AQUEOUS LATICES WITH A FLOW COEFFICIENT OF GREATER THAN 1.5.
Inventors
- 👤 John Joseph Hopwood
- 👤 Robert William Kershaw
- 👤 Frederick John Lubbock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:10
CPC Classifications
C; C09; C09D; C09D123/00; C09D123/02; C09D157/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |