US2772188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonia insolubilized methylol-phosphorus polymers and cellulosic materials impregnated therewith
Assignee: Individual
•
Filing: 1953-11-18
•
Granted: 1956-11-27
•
Expires: 1973-11-18
Abstract
No abstract record available.
Inventors
- 👤 Wilson A Reeves
- 👤 John D Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:10
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D06M15/43; D06M15/431
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS OF INSOLUBLIZING A FURTHER POLYMERIZABLE POLYMER OF A MIXTURE OF TETRAKIS(HYDROXYMETHYL) PHOSPHONIUM CHLORIDE AND TRIS(HYDROXYMETHYL) PHOSPHINE OXIDE WITH A WATER SOLUBLE EMTHYLOL GROUP SAID POLYMER CONTAINING AT LEAST ONE FREE METHYLOL GROUP ATTACHED TO A PHOSPHORUS ATOM, WHICH COMPRISES REACTING SAID POLYMER WITH AMMONIUM HYDROXIDE.
Claim 2
Dependent Claim
32 words
THE PROCESS OF CLAIM 3 IN WHICH THE REACTION IS EFFECTED BY IMPREGNATING A CELLULOSIC TEXTILE WITH THE FURTHER POLYMERIZABLE, DRYING THE WET TEXTILE, AND IMPREGNATING THE DRIED TEXTILE WITH AMMOMIUM HYDROXIDE.
References Cited (Backward Citations)
US2668096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |