US2643244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epichlorhydrin-sulfonamide resins
Assignee: Libbey Owens Ford Glass Co
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Filing: 1948-04-16
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Granted: 1953-06-23
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Expires: 1968-04-16
Abstract
No abstract record available.
Inventors
- 👤 Simons John Kenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:34
CPC Classifications
C; C08; C08G; C08G73/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF PRODUCING A SYNTHETIC RESIN THAT COMPRISES REACTING EPICHLOROHYDRIN AT A SULFAMINE RADICAL IN A SULFONAMIDE WHOSE MOLECULE HAS AT LEAST TWO HYDROGEN ATOMS EACH CONNECTED TO A SULFONAMIDE NITROGEN ATOM, IN A RATIO OF FROM 0.5 TO 3 MOLECULES OF EPICHLOROHYDRIN FOR TWO SULFONAMIDE HYDROGEN ATOMS, THE REACTION BEING CARRIED OUT IN AN AQUEOUS SOLUTION OF 1/2 TO 1 EQUIVALENTS OF A STRONG BASE FOR EACH MOL OF EPICHLOROHYDRIN.
Claim 2
Independent Claim
72 words
A METHOD OF PRODUCING A SYNTHETIC RESIN THAT COMPRISES REACTING EPICHLOROHYDRIN AT A SULFAMINE RADICAL IN A SULFONAMIDE WHOSE MOLECULE HAS AT LEAST TWO HYDROGEN ATOMS EACH CONNECTED TO A SULFONAMIDE NITROGEN ATOM, IN A RATIO OF FROM 0.5 TO 3 MOLECULES OF EPICHLOROHYDRIN FOR TWO SULFONAMIDE HYDROGEN ATOMS, THE REACTION BEING CARRIED OUT IN AN AQUEOUS SOLUTION OF 1/2 TO 1 EQUIVALENTS OF A STRONG BASE FOR EACH MOL OF EPICHLOROHYDRIN.
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) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |