US2565488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary 1, 3-alkenediamines
Assignee: Shell Development Co
•
Filing: 1947-07-07
•
Granted: 1951-08-28
•
Expires: 1967-07-07
Abstract
No abstract record available.
Inventors
- 👤 Harry De V Finch
- 👤 Elbert A Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:32
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/02; C07C215/04; C07C215/06; C07C215/08; C07C211/00; C07C211/01; C07C211/02; C07C211/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A DIAMINE HAVING A STRUCTURE DEFINED BY THE FORMULA
Claim 2
Dependent Claim
9 words
A DIAMINE HAVING A STRUCTURE DEFINED BY THE FORMULA
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) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |