US4362785A
Expired / Lapsed
US
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Polymers containing 2,5-oxolanylene segments
Assignee: 3M Co
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Filing: 1981-07-17
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Granted: 1982-12-07
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Expires: 2001-07-17
Abstract
Abstract Polymers containing recurring 2,5-oxolanylene units wherein at least 60 percent of the units are joined directly to one another so as to provide segments consisting of at least 6 of said units.
Inventors
- 👤 William J. Schultz
- 👤 Alan R. Katritzky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:57
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/027; C08C; C08C19/00; C08C19/30; C08C19/34; C08C19/40; C08F; C08F8/00; C08F8/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/31931; Y10T428/31938
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
85 words
As an article of manufacture, a normally hydrophobic substrate which has been rendered hydrophilic by application thereto of a coating of a water-insoluble polymer containing recurring 2,5-oxolanylene units of the formula: ##STR14## wherein at least 60 percent of said units are joined directly to one another so as to provide segments consisting of at least six of said units; and wherein R 1 , R 2 , R 3 and R 4 are, individually, hydrogen or alkyl groups containing up to 8 carbon atoms each.
Claim 2
Dependent Claim
85 words
As an article of manufacture, a normally hydrophobic substrate which has been rendered hydrophilic by application thereto of a coating of a water-insoluble polymer containing recurring 2,5-oxolanylene units of the formula: ##STR14## wherein at least 60 percent of said units are joined directly to one another so as to provide segments consisting of at least six of said units; and wherein R 1 , R 2 , R 3 and R 4 are, individually, hydrogen or alkyl groups containing up to 8 carbon atoms each.
Claim 3
Dependent Claim
16 words
An article of manufacture in accordance with claim 1 wherein said hydrophobic substrate comprises a polyester.
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) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |