US3790556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic solvent soluble diazonium compound formed from anionic sulfate or sulfonate surfactants
Assignee: Warren SD Co
•
Filing: 1971-04-28
•
Granted: 1974-02-05
•
Expires: 1991-04-28
Abstract
Abstract LIGHT-SENSITIVE, WATER-INSOLUBLE COMPOUNDS WHICH ARE FORMED BY REACTING AN ANIONIC SURFACTANT OF THE FORMULA X-SO3H WITH THE FORMALDEHYDE CONDENSATION PRODUCT OF A FIPHENYLAMINE-4-DIAZONIUM SALT AND WHICH ARE SOLUBLE IN A WIDE RANGE OF ORGANIC SOLVENTS, AND NEGATIVE WORKING LITHOGRAPHIC PLATES PROVIDED WITH A COATING OF THE LIGHTSENSITIVE COMPOUNDS.
Inventors
- 👤 T Doggett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:12
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |