US2873270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoazo dyestuffs
Assignee: Saul and Co
•
Filing: 1953-01-12
•
Granted: 1959-02-10
•
Expires: 1973-01-12
Abstract
No abstract record available.
Inventors
- 👤 Merian Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:01
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; C09B29/08; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A MONOAZO DYESTUFF WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
8 words
A MONOAZO DYESTUFF WHICH CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
US2492971A
Cited
US2590092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |