US2554786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluoro dinitriles
Assignee: Purdue Research Foundation
•
Filing: 1949-10-06
•
Granted: 1951-05-29
•
Expires: 1969-10-06
Abstract
No abstract record available.
Inventors
- 👤 Earl T Mcbee
- 👤 Park A Wiseman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:57
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/80; C07D211/84; C07D211/86; C07D211/88; C07C; C07C243/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A DINITRILE HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
6 words
A DINITRILE HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2426224A
Cited
US2422528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |