US4012507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor phase process to impart smolder resistance to cotton batting and other cellulosic materials
Assignee: United States Department of Agriculture
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Filing: 1975-03-05
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Granted: 1977-03-15
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Expires: 1995-03-05
Abstract
Abstract A method of imparting smolder resistance to cotton batting and other cellulosic materials through the use of the vapors from a mixture of boric acid, methyl alcohol, methyl borate and water at 18 DEG to 68 DEG C (65 DEG to 155 DEG F).
Inventors
- 👤 Nestor B. Knoepfler
- 👤 John P. Madacsi
- 👤 Julius P. Neumeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:20
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/50; D06M13/503; D06M11/00; D06M11/80; D06M11/82; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2958; Y10T428/2971
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
A process for imparting smolder resistance to a cellulosic material which process comprises contacting a cellulosic material having a water content of at least 0.1 percent with vapors of a system which consists of methanol, boric acid, methyl borate, and water having a boiling point of about 68° C and which reacts with the water present in the cellulosic substrate to form boric acid, maintaining the cellulosic material and vapors in contact between 1 and 120 minutes and temperatures at which the contact is conducted being maintained between 18° and 71° C so that the cellulosic material is rendered smolder resistant.
Claim 2
Dependent Claim
101 words
A process for imparting smolder resistance to a cellulosic material which process comprises contacting a cellulosic material having a water content of at least 0.1 percent with vapors of a system which consists of methanol, boric acid, methyl borate, and water having a boiling point of about 68° C and which reacts with the water present in the cellulosic substrate to form boric acid, maintaining the cellulosic material and vapors in contact between 1 and 120 minutes and temperatures at which the contact is conducted being maintained between 18° and 71° C so that the cellulosic material is rendered smolder resistant.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the cellulosic material is cotton batting.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein the concentration of boric acid in the alcohol is between 5 and 27.2 weight percent.
Claim 5
Dependent Claim
94 words
A process for imparting smolder resistance to a cellulosic material which process comprises contacting a cellulosic material having a water content of approximately 7 percent with vapors of a system which consists of a solution of 23.79% by weight sodium borate of the formula Na 2 B 4 O 7 .10 H 2 O in 63.9% by weight anhydrous methanol and 12.24% by weight concentrated sulfuric acid, maintaining the cellulosic material and vapors in contact between 1 and 120 minutes and at a temperature at which the contact is conducted at approximately 21° C.
Claim 6
Dependent Claim
94 words
A process for imparting smolder resistance to a cellulosic material which process comprises contacting a cellulosic material having a water content of approximately 7 percent with vapors of a system which consists of a solution of 23.79% by weight sodium borate of the formula Na 2 B 4 O 7 .10 H 2 O in 63.9% by weight anhydrous methanol and 12.24% by weight concentrated sulfuric acid, maintaining the cellulosic material and vapors in contact between 1 and 120 minutes and at a temperature at which the contact is conducted at approximately 21° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |