Patent US2811798A successfully refreshed from Google Patents.
Patent US3172702A successfully refreshed from Google Patents.
US2826558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perchloric acid solution of acrylonitrile polymer and method of making same
Assignee: ROTTWEILER KUNSTSEIDEFABRIK AG
•
Filing: 1955-11-02
•
Granted: 1958-03-11
•
Expires: 1975-11-02
Abstract
No abstract record available.
Inventors
- 👤 Binder Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:04
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/097; D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38; C08J2333/00; C08J2333/18; C08J2333/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
A SOLUTION SUITABLE FOR PRODUCING SHAPED ARTICLES CONSISTING ESSENTIALLY OF AN ACRYLONITRILE POLYMER IN AQUEOUS PERCHLORIC ACID, SAID POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILE, THE CO-POLYMER OF ACRYLONITRILE WITH VINYL CHLORIDE, THE CO-POLYMER OF ACRYLONITRILE WITH METHACRYLONITRILE, THE CO-POLYMER OF ACRYLONITRILE WITH VINYL ACETATE AND THE CO-POLYMER OF ACRYLONITRILE WITH METHYL ACRYLATE, SAID CO-POLYMER CONTAINING AT LEAST 85% BY WEIGHT OF MONOMERIC ACRYLONITRILE, AND SAID AQUEOUS PERCHLORIC ACID HAVING A CONCENTRATION OF ABOUT 50% BY WEIGHT HCIO4.
References Cited (Backward Citations)
US2579451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |