Patent US2515628A successfully refreshed from Google Patents.
US2515628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aliphatic-cyano-azo compounds
Assignee: EIDP Inc
•
Filing: 1947-03-22
•
Granted: 1950-07-18
•
Expires: 1967-03-22
Abstract
No abstract record available.
Inventors
- 👤 Castle John Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:34
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/63; C07C255/65; C08; C08F; C08F4/00; C08F4/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
6 words
AN AZO COMPOUND OF 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) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |