US2779758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromable disazo dyestuffs
Assignee: Saul and Co
•
Filing: 1952-08-12
•
Granted: 1957-01-29
•
Expires: 1972-08-12
Abstract
No abstract record available.
Inventors
- 👤 Neier Reinhard
- 👤 Petitjean Charles
- 👤 Wehrli Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:42
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A DISAZO DYSESTUFF WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
8 words
A DISAZO DYSESTUFF WHICH CORRESPONDS TO 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) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |