US3460896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester fibers having improved hydrophilicity as a result of modification with phosphoric acid,phosphorous acid or perchloric acid
Assignee: Eastman Kodak Co
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Filing: 1964-10-14
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Granted: 1969-08-12
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Expires: 1984-10-14
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:22
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/07; D06M11/30; D06M11/51; D06M11/55; D06M11/68; D06M11/70; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A HIGH MELTING CRYSTALLINE LINEAR POLYESTER FIBER MATERIAL MADE BY THE PROCESS WHICH COMPRISES (1) COATING SAID FIBERS WITH AN ESSENTIALLY AQUEOUS SOLUTION CONTAINING AN INORGANIC ACID HAVING A DISSOCIATING CONSTANT OF AT LEAST 10**-3, OF AMMONIUM SALTS OF SUCH ACIDS, OR VOLATILE AMINE SALTS OF SUCH ACIDS, WHEREIN SAID INORGANIC ACID IS PHOSPHORIC ACID, PHOSPHOROUS ACID, OR PERCHLORIC ACID, (2) HEATING SAID COATED FIBERS TO FORM SUBSTANTIALLY DRY ACID COATED FIBERS HAVING ON THE SURFACE FROM ABOUT 0.05 TO ABOUT 5% BY WEIGHT OF SAID ACID, (3) HEATING AT 80 TO 200*C. SAID SUBSTANTIALLY DRY ACID COATED FIBERS TO FORM POLAR GROUPS ON THE FIBER SURFACES WITHOUT SIGNIFICANT ALTERNATION OF THE PHYSICAL SURFACE STRUCTURE, AND (4) WASHING SAID FIBERS TO REMOVE SUBSTANTIALLY ALL OF SAID ACID.
Claim 2
Dependent Claim
127 words
A HIGH MELTING CRYSTALLINE LINEAR POLYESTER FIBER MATERIAL MADE BY THE PROCESS WHICH COMPRISES (1) COATING SAID FIBERS WITH AN ESSENTIALLY AQUEOUS SOLUTION CONTAINING AN INORGANIC ACID HAVING A DISSOCIATING CONSTANT OF AT LEAST 10**-3, OF AMMONIUM SALTS OF SUCH ACIDS, OR VOLATILE AMINE SALTS OF SUCH ACIDS, WHEREIN SAID INORGANIC ACID IS PHOSPHORIC ACID, PHOSPHOROUS ACID, OR PERCHLORIC ACID, (2) HEATING SAID COATED FIBERS TO FORM SUBSTANTIALLY DRY ACID COATED FIBERS HAVING ON THE SURFACE FROM ABOUT 0.05 TO ABOUT 5% BY WEIGHT OF SAID ACID, (3) HEATING AT 80 TO 200*C. SAID SUBSTANTIALLY DRY ACID COATED FIBERS TO FORM POLAR GROUPS ON THE FIBER SURFACES WITHOUT SIGNIFICANT ALTERNATION OF THE PHYSICAL SURFACE STRUCTURE, AND (4) WASHING SAID FIBERS TO REMOVE SUBSTANTIALLY ALL OF SAID ACID.
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) | 1972-08-11 | 1973-02-10 | 1973-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-11 | 1977-02-10 | 1977-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-11 | 1981-02-10 | 1981-08-12 | $7700.00 | Window Closed / Lapsed |