Patent US2706199A successfully refreshed from Google Patents.
US2706199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
(ortho-hydroxy-carboxy)-phenyl esters of phthalocyanine tetrasulphonic acids and a process for making the same
Assignee: Durand and Huguenin AG
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Filing: 1953-01-05
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Granted: 1955-04-12
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Expires: 1973-01-05
Abstract
No abstract record available.
Inventors
- 👤 Brentano Willy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:34
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; C09B47/24; C09B47/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
17 words
AS NEW BLUE TO GREEN DYESTFFS, THE (ORTHO-HYDROXYCARBOXY)-PHENYL ESTERS OF PHTHALOCYANINE TETRASULPHONIC ACIDS HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-11 | 1958-10-11 | 1959-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-11 | 1962-10-11 | 1963-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-11 | 1966-10-11 | 1967-04-12 | $7700.00 | Window Closed / Lapsed |