US3063780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetra-aza porphine dyestuffs
Assignee: Bayer AG
•
Filing: 1958-11-26
•
Granted: 1962-11-13
•
Expires: 1978-11-26
Abstract
No abstract record available.
Inventors
- 👤 Rosch Georg
- 👤 Klappert Helmut
- 👤 Gehringer Karl-Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:10
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; Y; Y10; Y10S; Y10S8/00; Y10S8/02; Y10S8/916; Y10S8/917; Y10S8/918; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
PROCESS FOR THE MANUFACTURING OF DYESTUFFS WHICH COMPRISES REACTING WATER-INSOLUABLE TETA-AZA-PORPHINE CONTAINING AROMATIC GROUPONGS WITH TERTIARY AMINO GROUPS, WITH W-HALO-N-METHYLIMIDES OF DICARBOXYLIC ACIDS IN THE PRESENCE OF ORGANIC ACIDS.
Claim 2
Dependent Claim
29 words
PROCESS FOR THE MANUFACTURING OF DYESTUFFS WHICH COMPRISES REACTING WATER-INSOLUABLE TETA-AZA-PORPHINE CONTAINING AROMATIC GROUPONGS WITH TERTIARY AMINO GROUPS, WITH W-HALO-N-METHYLIMIDES OF DICARBOXYLIC ACIDS IN THE PRESENCE OF ORGANIC ACIDS.
References Cited (Backward Citations)
US2683643A
Cited
US2823205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |