US2761868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonated and unsulfonated imidomethyl, carboxyamidomethyl and aminomethyl phthalocyanines
Assignee: Wyeth Holdings LLC
•
Filing: 1953-05-13
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Granted: 1956-09-04
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Expires: 1973-05-13
Abstract
No abstract record available.
Inventors
- 👤 Harold T Lacey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:30
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; C09B47/12; C09B47/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A PTHTHALCOYANINE COMPOUND HAVING THE FORMUAL:
Claim 2
Dependent Claim
6 words
A PTHTHALCOYANINE COMPOUND HAVING THE FORMUAL:
References Cited (Backward Citations)
US2490704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |