US2592301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric 1, 4-dicyano-2-butene
Assignee: EIDP Inc
•
Filing: 1949-11-14
•
Granted: 1952-04-08
•
Expires: 1969-11-14
Abstract
No abstract record available.
Inventors
- 👤 Robert G Linville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:34
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
POLYMERIC 1,4-DICYANO-2-BUTENE HAVING A MOLECULAR WEIGHT OF AT LEAST 400.
Claim 2
Dependent Claim
10 words
POLYMERIC 1,4-DICYANO-2-BUTENE HAVING A MOLECULAR WEIGHT OF AT LEAST 400.
References Cited (Backward Citations)
US2448755A
Cited
US2342101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |