US2668096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flameproof fibrous aminoethylated cellulose derivatives
Assignee: Individual
•
Filing: 1952-04-22
•
Granted: 1954-02-02
•
Expires: 1972-04-22
Abstract
No abstract record available.
Inventors
- 👤 Wilson A Reeves
- 👤 John D Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:04
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/06; D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/285; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D06M15/43; D06M15/431; D06M15/667; D06M15/673
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
A PROCESS COMPRISING: IMPREGNATING AN AMINIZED CELLULOSE FABRIC CONTAINING A PLURALITY OF PRIMARY AMINO GROUPS WITH A WATER SOLUTION OF AT LEAST ONE OF THE THREE MEMBERS OF THE GROUP CONSISTING OF (1) TETRAKIS (HYDROXYMETHYL) PHOSPHONIUM CHLORIDE, (2) WATER SOLUBLE PARTIAL REACTION PRODUCTS OF TETRAKIS (HYDROXYMETHYL) PHOSPHONIUM CHLORIDE AND A POLYAMIDE OF THE GROUP CONSISTING OF MELAMINE, GUANIDINE AND UREA, AND (3) WATER SOLUBLE PARTIAL REACTION PRODUCTS OF TETRAKIS (HYDROXYMETHYL) PHOSPHONIUM CHLORIDE, FORMALDEHYDE, AND A POLYAMINE OF THE GROUP CONSISTING OF MELAMINE, GUANIDINE AND UREA; AND CURING THE IMPREGNATED FABRIC AT FROM ABOUT 80 TO ABOUT 160* C. FOR FROM ABOUT 4 TO ABOUT 30 MINUTES, USING THE LONGER TIMES WITH THE LOWER TEMPERATURES.
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) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |