US3748154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intumescent coating composition comprising aromatic sulfonamides
Assignee: Cities Service Co
•
Filing: 1972-01-11
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Granted: 1973-07-24
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Expires: 1992-01-11
Abstract
Abstract A BINDER SHOWING THERMAL CHANGE AT A SUITABLE TEMPERATURE IS USED TO DISSOLVE OR DISPERSE AN AROMATIC SULFONAMIDE INTUMESCENT AGENT BEARING A NUCLEAR SUBSTITUENT WHICH IS LINKED TO THE AROMATIC RING THROUGH A NITROGEN ATOM. AMONG THE PREFERRED BINDERS ARE SUITABLE VINYL CHLORIDE/VINYLIDENE CHLORIDE AND VINYL CHLORIDE/VINYL ACETATE COPOLYMERS, CHLORINATED RUBBER, AND CHLORINATED OR CHLOROSULFONATED POLYETHYLENES. THE PREFERRED INTUMESCENT AGENTS ARE P-AMINOBENZENE SULFONAMIDE AND P-ACETAMIDOBENZENESULFONAMIDE.
Inventors
- 👤 J Seipel
- 👤 S Roth
- 👤 J Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:14
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/18; C09D5/185
Claims Analysis
Total Claims: 0
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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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |