US2928831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aminoalkylaminomethylenemalononitriles and their preparation
Assignee: STWB Inc
•
Filing: 1957-07-02
•
Granted: 1960-03-15
•
Expires: 1977-07-02
Abstract
No abstract record available.
Inventors
- 👤 Alexander R Surrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:21
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
15 words
A COMPOSITION OF MATTER SELECTED FROM THE GROUP CONSISTING OF A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
15 words
A COMPOSITION OF MATTER SELECTED FROM THE GROUP CONSISTING OF A COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 4
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
CH239952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |