Patent US3909279A successfully refreshed from Google Patents.
US3909279A
Expired / Lapsed
US
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Bonding composition
Assignee: United States Department of the Interior
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Filing: 1974-07-05
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Granted: 1975-09-30
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Expires: 1994-07-05
Abstract
Abstract A composition for bonding semipermeable membranes, e.g., reverse osmosis membranes, comprising triacetin, propyl alcohol and cellulose acetate.
Inventors
- 👤 Serop Manjiklan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:08
CPC Classifications
B; B01; B01D; B01D65/00; B01D65/003; C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/10; B01D61/00; B01D61/02; B01D61/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A BONDING COMPOSITION CONSISTING ESSENTIALLY OF (1) ABOUT 85 TO 95 PARTS BY VOLUME OF TRIACETIN, (2) ABOUT 5 TO 15 PARTS OF VOLUME OF PROPYL ALCOHOL AND (3) CELLULOSE DIACETATE IN AN AMOUNT OF ABOUT 2 TO 6 GRAMS PER 100 ML OF TRIACETIN.
Claim 2
Dependent Claim
45 words
A BONDING COMPOSITION CONSISTING ESSENTIALLY OF (1) ABOUT 85 TO 95 PARTS BY VOLUME OF TRIACETIN, (2) ABOUT 5 TO 15 PARTS OF VOLUME OF PROPYL ALCOHOL AND (3) CELLULOSE DIACETATE IN AN AMOUNT OF ABOUT 2 TO 6 GRAMS PER 100 ML OF TRIACETIN.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |