US2725311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treatment of cellulosic materials to impart flame resistance thereto and articles produced thereby
Assignee: Dow Chemical Co
•
Filing: 1953-05-20
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Granted: 1955-11-29
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Expires: 1973-05-20
Abstract
No abstract record available.
Inventors
- 👤 Duane L Kenaga
- 👤 Arthur J Erbel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:27
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/288; Y; Y10; Y10T; Y10T428/00; Y10T428/4935; Y10T428/662
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE PROCESS OF RENDERING NORMALLY FLAMMABLE CELLULOSIC MATERIAL FIRE RETARDANT COMPRISING THE IMPREGNATION OF SAID CELLULOSIC MATERIAL WITH A SOLUTION CONSISTING OF FROM 5 TO 40 PER CENT OF A BIS-(OMEGA-MONOHALOALKYL)-OMOGA-MONOHALOALKANE PHOSPHONATE, IN WHICH THE ALKYL AND ALKANE GROUPS ARE ALKALI AND CONTAINS FROM 2 TO 3 CARBON ATOMS, AND IN WHICH THE HALOGENS ARE SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE, AND CORRESPONDING FROM 95 TO 60 PER CENT OF A VOLATILE SOLVENT: AND THEREAFTER REMOVING SUBSTANTIALLY ALL OF SAID SOLVENT.
Claim 2
Dependent Claim
84 words
THE PROCESS OF RENDERING NORMALLY FLAMMABLE CELLULOSIC MATERIAL FIRE RETARDANT COMPRISING THE IMPREGNATION OF SAID CELLULOSIC MATERIAL WITH A SOLUTION CONSISTING OF FROM 5 TO 40 PER CENT OF A BIS-(OMEGA-MONOHALOALKYL)-OMOGA-MONOHALOALKANE PHOSPHONATE, IN WHICH THE ALKYL AND ALKANE GROUPS ARE ALKALI AND CONTAINS FROM 2 TO 3 CARBON ATOMS, AND IN WHICH THE HALOGENS ARE SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE, AND CORRESPONDING FROM 95 TO 60 PER CENT OF A VOLATILE SOLVENT: AND THEREAFTER REMOVING SUBSTANTIALLY ALL OF SAID SOLVENT.
References Cited (Backward Citations)
US2436141A
Cited
US2559754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |