Patent US3776967A successfully refreshed from Google Patents.
Patent US2811469A successfully refreshed from Google Patents.
US2811469A
Expired / Lapsed
US
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Fabric flameproofing process
Assignee: Victor Chemical Works
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Filing: 1952-08-05
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Granted: 1957-10-29
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Expires: 1972-08-05
Abstract
No abstract record available.
Inventors
- 👤 James R Costello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:32
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/288; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METHOD OF PRODUCING A FLEXIBLE FLAMEPROOFED CELLULOSIC FABRIC WHICH COMPRISES PARTIALLY POLYMERIZING A DI-(BETA GAMMA UNSATURATED) ALKENYL MONOCHLOROMETHANEPHOSPHONATE IN A SUITABLE ORGANIC SOLVENT, PRECIPITATING THE PARTIAL POLYMER IN A SELECTIVE SOLVENT FOR THE UNPOLYMERIZED ESTER, SEPARATING THE POLYMER AND DISSOLVING IT IN A SUITABLE ORGANIC SOLVENT, APPLYING SUCH SOLUTION TO A CELLULOSIC FABRIC, REMOVING THE EXCESS SOLUTION, EVAPORATING OFF THE SOLVENT, AND CURING THE TREATED FABRIC AT A TEMPERATURE SUFFICIENT TO CAUSE FURTHER POLYMERIZATION AND ATTACHMENT OF THE POLYMER TO THE FIBRES OF THE FABRIC.
Claim 2
Independent Claim
86 words
THE METHOD OF PRODUCING A FLEXIBLE FLAMEPROOFED CELLULOSIC FABRIC WHICH COMPRISES PARTIALLY POLYMERIZING A DI-(BETA GAMMA UNSATURATED) ALKENYL MONOCHLOROMETHANEPHOSPHONATE IN A SUITABLE ORGANIC SOLVENT, PRECIPITATING THE PARTIAL POLYMER IN A SELECTIVE SOLVENT FOR THE UNPOLYMERIZED ESTER, SEPARATING THE POLYMER AND DISSOLVING IT IN A SUITABLE ORGANIC SOLVENT, APPLYING SUCH SOLUTION TO A CELLULOSIC FABRIC, REMOVING THE EXCESS SOLUTION, EVAPORATING OFF THE SOLVENT, AND CURING THE TREATED FABRIC AT A TEMPERATURE SUFFICIENT TO CAUSE FURTHER POLYMERIZATION AND ATTACHMENT OF THE POLYMER TO THE FIBRES OF THE FABRIC.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |