US2991277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of trifluoroethyl vinyl ether and alkyl esters of acrylic of methacrylic acid, and method for preparing same
Assignee: Airco Inc
•
Filing: 1955-06-10
•
Granted: 1961-07-04
•
Expires: 1975-06-10
Abstract
No abstract record available.
Inventors
- 👤 Calvin E Schildknecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:16
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F16/00; C08F16/12; C08F16/14; C08F16/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
47 words
A BINARY COPOLYMER CONTAINING FROM 5 TO 95 PERCENT BY WEIGHT OF SAID COPOLYMER OF 2,2,2-TRIFLUOROETHYL VINYL ETHER AND FROM 95 TO 5 PERCENT BY WEIGHT OF SAID COPOLYMER OF AN ALKYL ESTER OF AN UNSATURATED ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC AND METHACRYLIC 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) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |