Patent US2671771A successfully refreshed from Google Patents.
US2671771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epichlorhydrin-sulfonamide resins
Assignee: Honeywell International Inc
•
Filing: 1948-05-07
•
Granted: 1954-03-09
•
Expires: 1968-05-07
Abstract
No abstract record available.
Inventors
- 👤 Simons John Kenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:27
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30; C08G59/302; C08G65/00; C08G65/02; C08G65/26; C08G65/2636
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A FAST-CURING SULFONAMIDE RESIN THAT IS A PRODUCT OF THE CONDENSATION OF FROM 0.5 TO 3 MOLS OF EPICHLOROHYDRIN WITH A QUANTITY OF A DISULFONAMIDE THAT CONTAINS 2 GRAM ATOMS OF HYDROGEN ATOMS ATTACHED TO SULFONAMIDE NITROGEN ATOMS, WHOSE POLYMER STRUCTURE COMPRISES DISULFONAMIDE UNITS HAVING THE FORMULA
Claim 2
Dependent Claim
47 words
A FAST-CURING SULFONAMIDE RESIN THAT IS A PRODUCT OF THE CONDENSATION OF FROM 0.5 TO 3 MOLS OF EPICHLOROHYDRIN WITH A QUANTITY OF A DISULFONAMIDE THAT CONTAINS 2 GRAM ATOMS OF HYDROGEN ATOMS ATTACHED TO SULFONAMIDE NITROGEN ATOMS, WHOSE POLYMER STRUCTURE COMPRISES DISULFONAMIDE UNITS HAVING 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) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |