US3253880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonation of acrylonitrile polymers with sulfur trioxide to increase dye receptivity
Assignee: Solutia Inc
•
Filing: 1961-10-09
•
Granted: 1966-05-31
•
Expires: 1981-10-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Julian K Lawson
- 👤 Jean B Bond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:01
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/673; D06P1/67333; D06P1/6735; D06P1/67375; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR RENDERING ACYLONITRILE POLYMERS MORE DYE RECEPTIVE CONSISTING OF CONTACTING A POLYMER COMPRISING AT LEAST 35 PERCENT ACRYLONITRILE WITH ONE MOLE OF SULFUR TRIOXIDE PER 8 TO 12 MOLES OF ACRYLONITRILE SO AS TO INCORPORATE ABOUT 4.9% TO 7.4% BY WEIGHT OF SULFUR IN THE POLYMER AND AT A TEMPERATURE OF FROM -50*C. TO 50*C.
Claim 2
Dependent Claim
57 words
A PROCESS FOR RENDERING ACYLONITRILE POLYMERS MORE DYE RECEPTIVE CONSISTING OF CONTACTING A POLYMER COMPRISING AT LEAST 35 PERCENT ACRYLONITRILE WITH ONE MOLE OF SULFUR TRIOXIDE PER 8 TO 12 MOLES OF ACRYLONITRILE SO AS TO INCORPORATE ABOUT 4.9% TO 7.4% BY WEIGHT OF SULFUR IN THE POLYMER AND AT A TEMPERATURE OF FROM -50*C. TO 50*C.
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |