US2639290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of cupric chloride and amino hydroquinone ethers and process
Assignee: American Optical Corp
•
Filing: 1950-06-30
•
Granted: 1953-05-19
•
Expires: 1970-06-30
Abstract
No abstract record available.
Inventors
- 👤 Mahler Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:29
CPC Classifications
C; C09; C09B; C09B59/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A RELATIVELY FINE, POWDERY, BLACK, SUBSTANTIALLY DENSE, LOW REFLECTIVE COMPOSITION WHICH IS A PRECIPITATE RESULTING FROM THE REACTION OF CUPRIC CHLORIDE AND AN INGREDIENT SELECTED FROM THE GROUP CONSISTING OF AMINO HYDROQUINONE ETHER AND AMINO HYDROQUINONE DIMETHYL ETHER IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF WATER, ACETONE AND DENATURED ALCOHOL.
Claim 2
Dependent Claim
52 words
A RELATIVELY FINE, POWDERY, BLACK, SUBSTANTIALLY DENSE, LOW REFLECTIVE COMPOSITION WHICH IS A PRECIPITATE RESULTING FROM THE REACTION OF CUPRIC CHLORIDE AND AN INGREDIENT SELECTED FROM THE GROUP CONSISTING OF AMINO HYDROQUINONE ETHER AND AMINO HYDROQUINONE DIMETHYL ETHER IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF WATER, ACETONE AND DENATURED ALCOHOL.
References Cited (Backward Citations)
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Cited
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US2193035A
Cited
US2172249A
Cited
US2310228A
Cited
US2278965A
Cited
US2301762A
Cited
US2490717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |