Patent US2643986A successfully refreshed from Google Patents.
US2643986A
Expired / Lapsed
US
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Fiber-forming polymers rendered dye-receptive by reaction with tris (dimethylamido) phosphite
Assignee: Solutia Inc
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Filing: 1951-01-26
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Granted: 1953-06-30
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Expires: 1971-01-26
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
- 👤 Alfred B Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:41
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A METHOD OF PREPARING DYE-RECEPTIVE POLYMERS WHICH COMPRISES REACTING TRIS(DIMETHYLAMIDO)PHOSPHITE AND A POLYMER OF A MONOMERIC SUBSTANCE OF WHICH AT LEAST TWO PERCENT BY WEIGHT OF THE TOTAL MONOMER CONTENT IS A COMPOUND OF THE STRUCTURE:
Claim 2
Independent Claim
36 words
A METHOD OF PREPARING DYE-RECEPTIVE POLYMERS WHICH COMPRISES REACTING TRIS(DIMETHYLAMIDO)PHOSPHITE AND A POLYMER OF A MONOMERIC SUBSTANCE OF WHICH AT LEAST TWO PERCENT BY WEIGHT OF THE TOTAL MONOMER CONTENT IS A COMPOUND OF THE STRUCTURE:
References Cited (Backward Citations)
US2503245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |