US3645938A
Expired / Lapsed
US
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Adhesive compositions for water-wet cellulosic membranes
Assignee: Eastman Kodak Co
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Filing: 1969-01-02
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Granted: 1972-02-29
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Expires: 1989-01-02
Abstract
Abstract WATER-WET CELLULOSE ACETATE MEMBRANES CAN BE JOINED TOGETHER EFFECTIVELY BY USE OF A LIQUID ADHESIVE COMPOSITION CONTAINING 2-ETHOXYETHYL ACETATE AND/OR METHYL ETHYL KETONE AND A COMPATIBLE POLYMER. THE ADHESIVE COMPOSITIONS CAN ALSO CONTAIN A SMALL AMOUNT OF A TACKIFYING RESIN SUCH AS POLY(A-METHYL STYRENE).
Inventors
- 👤 Gerard J Clarke
- 👤 Martin E Rowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:57
CPC Classifications
B; B01; B01D; B01D65/00; B01D65/003; B01D71/00; B01D71/06; B01D71/08; B01D71/12; B01D71/14; B01D71/16; C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/095; C08J5/00; C08J5/12; C08J5/124; C08J5/125; C08J2301/00; C08J2301/08; C08J2301/10; C08J2301/12
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |