US2676161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions comprising a polymer of acrylonitrile and a cyanomethyl ester
Assignee: Wyeth Holdings LLC
•
Filing: 1952-10-31
•
Granted: 1954-04-20
•
Expires: 1972-10-31
Abstract
No abstract record available.
Inventors
- 👤 Cresswell Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:16
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A COMPOSITION OF MATTER COMPRISING (1) A POLYMERIZATION PRODUCT CONTAINING IN THE POLYMER MOLECULES AN AVERAGE OF AT LEAST 75% BY WEIGHT OF COMBINED ACRYLONITRILE AND (2) A CYANOMETHYL ESTER REPRESENTED BY THE GENERAL FORMULA
Claim 2
Dependent Claim
35 words
A COMPOSITION OF MATTER COMPRISING (1) A POLYMERIZATION PRODUCT CONTAINING IN THE POLYMER MOLECULES AN AVERAGE OF AT LEAST 75% BY WEIGHT OF COMBINED ACRYLONITRILE AND (2) A CYANOMETHYL ESTER REPRESENTED BY THE GENERAL FORMULA
References Cited (Backward Citations)
US2404723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |