US2795583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phthalocyanine derivatives
Assignee: GAF Chemicals Corp
•
Filing: 1953-07-14
•
Granted: 1957-06-11
•
Expires: 1973-07-14
Abstract
No abstract record available.
Inventors
- 👤 Tellis A Martin
- 👤 David I Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:06
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF 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) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |