Patent US2873280A successfully refreshed from Google Patents.
US2873280A
Expired / Lapsed
US
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Phthalocyanine-sulfonamides and process for their manufacture
Assignee: Bayer AG
•
Filing: 1956-10-09
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Granted: 1959-02-10
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Expires: 1976-10-09
Abstract
No abstract record available.
Inventors
- 👤 Bienert Berthold
- 👤 Breig Kurt
- 👤 Groll Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:46
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; C09B47/24; C09B47/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
PHTHALOCYANINE-AMIDE CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
5 words
PHTHALOCYANINE-AMIDE CORRESPONDING 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) | 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 |