Patent US2826573A successfully refreshed from Google Patents.
US2826573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoacid salts of aralkyl polyamines and metallized monoazo dyestuffs
Assignee: GAF Chemicals Corp
•
Filing: 1953-10-02
•
Granted: 1958-03-11
•
Expires: 1973-10-02
Abstract
No abstract record available.
Inventors
- 👤 Albert F Strobel
- 👤 William W Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:42
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
METALLIZED MONOAZO DYESTUFFS SELECTED FROM THE CLASS CONSISTING OF THOSE HAVING THE FOLLOWING FORMULAE:
Claim 2
Dependent Claim
14 words
METALLIZED MONOAZO DYESTUFFS SELECTED FROM THE CLASS CONSISTING OF THOSE HAVING THE FOLLOWING FORMULAE:
References Cited (Backward Citations)
US1800300A
Cited
US2038298A
Cited
US2215105A
Cited
US2565898A
Cited
US2555603A
Cited
US2539212A
Cited
US2628960A
Cited
US2619502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |