US3299011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming finely-divided material from filament-forming synthetic linear polyamide
Assignee: FMC Corp
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Filing: 1965-12-28
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Granted: 1967-01-17
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Expires: 1985-12-28
Abstract
No abstract record available.
Inventors
- 👤 Orlando A Battista
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:40
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J2377/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS FOR PREPARING FINELY-DIVIDED MATERIAL FROM FILAMENT-FORMING SYNTHETIC LINEAR POLYAMIDE WHICH COMPRISES FIRST TREATING SAID POLYAMIDE WITH A DILUTE AQUEOUS SOLUTION OF A MINERAL ACID SELECTEDFROM THE GROUP INCLUDING HYDROCHLORIC, SULFURIC, AND NITRIC ACIDS AT A TEMPERATURE OF AT LEAST 50*C. WITHOUT SUBSTANTIAL DISSOLUTION THEREOF WHEREBY A POLYAMIDE MATERIAL IS OBTAINED HAVING A PROPORTIONATELY HIGHER CRYSTALLINE CONTENT THAN THAT MATERIAL PRIOR TO THE ACID TREATMENT, THEREAFTER TREATING THE CRYSTALLINE POLYAMIDE WITH A LIQUID SWELLING AGENT THEREFORE, AND THEN MECHANICALLY ATTRITING SAID POLYAMIDE.
Claim 2
Dependent Claim
83 words
A PROCESS FOR PREPARING FINELY-DIVIDED MATERIAL FROM FILAMENT-FORMING SYNTHETIC LINEAR POLYAMIDE WHICH COMPRISES FIRST TREATING SAID POLYAMIDE WITH A DILUTE AQUEOUS SOLUTION OF A MINERAL ACID SELECTEDFROM THE GROUP INCLUDING HYDROCHLORIC, SULFURIC, AND NITRIC ACIDS AT A TEMPERATURE OF AT LEAST 50*C. WITHOUT SUBSTANTIAL DISSOLUTION THEREOF WHEREBY A POLYAMIDE MATERIAL IS OBTAINED HAVING A PROPORTIONATELY HIGHER CRYSTALLINE CONTENT THAN THAT MATERIAL PRIOR TO THE ACID TREATMENT, THEREAFTER TREATING THE CRYSTALLINE POLYAMIDE WITH A LIQUID SWELLING AGENT THEREFORE, AND THEN MECHANICALLY ATTRITING SAID POLYAMIDE.
References Cited (Backward Citations)
US2265127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |