Patent US3842044A successfully refreshed from Google Patents.
US3842044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing sultone-or hydroxyalkanesulfonate-modified polyamides
Assignee: Phillips Petroleum Co
•
Filing: 1972-09-18
•
Granted: 1974-10-15
•
Expires: 1992-09-18
Abstract
Abstract 1. IN PRODUCING A FIBER FORMING POLYAMIDE CONSISTING ESSENTIALLY OF THE FIBER FORMING ALIPHATIC POLYCARBONAMIDE PRODUCT OF A DICARBOXYLIC ACID AND A DIAMINE, OR A SALT OF A DICARBOXYLIC ACID A DIAMINE, A METHOD FOR IMPROVING THE DYEABILITY OF THE RESULTANT POLYMER COMPRISING INCORPORATING INTO SAID POLYAMIDE FROM ABOUT 0.05 TO ABOUT 5 MOLE PERCENT 1,3-PROPANESULTONE.
Inventors
- 👤 J Cleary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:21
CPC Classifications
C; C08; C08L; C08L77/00; C08G; C08G69/00; C08G69/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN PRODUCING A FIBER FORMING POLYAMIDE CONSISTING ESSENTIALLY OF THE FIBER FORMING ALIPHATIC POLYCARBONAMIDE PRODUCT OF A DICARBOXYLIC ACID AND A DIAMINE, OR A SALT OF A DICARBOXYLIC ACID A DIAMINE, A METHOD FOR IMPROVING THE DYEABILITY OF THE RESULTANT POLYMER COMPRISING INCORPORATING INTO SAID POLYAMIDE FROM ABOUT 0.05 TO ABOUT 5 MOLE PERCENT 1,3-PROPANESULTONE.
Claim 2
Dependent Claim
55 words
IN PRODUCING A FIBER FORMING POLYAMIDE CONSISTING ESSENTIALLY OF THE FIBER FORMING ALIPHATIC POLYCARBONAMIDE PRODUCT OF A DICARBOXYLIC ACID AND A DIAMINE, OR A SALT OF A DICARBOXYLIC ACID A DIAMINE, A METHOD FOR IMPROVING THE DYEABILITY OF THE RESULTANT POLYMER COMPRISING INCORPORATING INTO SAID POLYAMIDE FROM ABOUT 0.05 TO ABOUT 5 MOLE PERCENT 1,3-PROPANESULTONE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |