US3873636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block copolymer of a vinyl monomer and a poly-3,3,3-trifluoropropylmethylsiloxane
Assignee: Dow Silicones Corp
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Filing: 1973-09-17
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Granted: 1975-03-25
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Expires: 1993-09-17
Abstract
Abstract A block copolymer having at least one block of a vinylic polymer and at least one block of a poly-3,3,3trifluoropropylmethylsiloxane is useful as a dispersant for mixtures of vinylic polymers and poly-3,3,3trifluoropropylmethylsiloxane.
Inventors
- 👤 John C Saam
- 👤 Frederick W G Fearon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:49
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/442; Y; Y10; Y10S; Y10S525/00; Y10S525/911
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
15 words
A BLOCK COPOLYMER CONSISTING ESSENTIALLY OF AT LEAST ONE ORGANIC BLOCK REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
15 words
A BLOCK COPOLYMER CONSISTING ESSENTIALLY OF AT LEAST ONE ORGANIC BLOCK REPRESENTED BY THE FORMULA
Claim 3
Dependent Claim
18 words
The block copolymer in accordance with claim 1 in which the molecular weight is greater than 30,000 inclusive.
Claim 4
Dependent Claim
37 words
The block copolymer in accordance with claim 1 in which R is a butyl radical, R'' is a hydrogen atom, G is a phenyl radical, each R'''' is a methyl radical and Z is a vinyl radical.
Claim 5
Dependent Claim
37 words
The block copolymer in accordance with claim 2 in which R is a butyl radical, R'' is a hydrogen atom, G is a phenyl radical, each R'''' is a methyl radical and Z is a vinyl radical.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |