Patent US2648660A successfully refreshed from Google Patents.
US2648660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process fob
Assignee: —
•
Filing: —
•
Granted: 1953-08-11
•
Expires: 1970-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:31
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/90; C07C; C07C311/00; C07C311/48; C07C311/49; C09; C09B; C09B62/00; C09B62/44; C09B62/503; C09B62/507; C09B62/513; D; D06; D06P; D06P1/00; D06P1/38; D06P3/00; D06P3/58; D06P3/60; D06P3/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
AS A NEW PRODUCT, A DIAZOAMINO COMPOUND OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
11 words
AS A NEW PRODUCT, A DIAZOAMINO COMPOUND OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2124594A
Cited
US2375132A
Cited
US1982681A
Cited
US2078387A
Cited
US2349091A
Cited
US2453430A
Cited
GB611320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |