US2875167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and composition for rendering fabrics resistant to the passage of toxic gases
Assignee: Individual
•
Filing: 1956-05-17
•
Granted: 1959-02-24
•
Expires: 1976-05-17
Abstract
No abstract record available.
Inventors
- 👤 Francis W Minor
- 👤 Anthony M Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:54
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/73; D06M11/74; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/267; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2508; Y10T442/273
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A COMPOSITION FOR RENDERING CLOTH RESISTANT TO TOXIC GASES AND LIQUIDS CONSISTING ESSENTIALLY OF AN AQUEOUS AMMONIACAL SUSPENSION OF FINELY DIVIDED ACTIVATED CHARCOAL, AN EMULSIFIED BUTADIENE-STYRENE COPLYMER, AND AT LEAST ONE COPOLYMER OF STYRENE AND MONOSECONDARY BUTYL MALEATE, SAID CHARCOAL CONSTITUTING FROM 5 TO 25 PERCENT OF SAID COMPOSITION AND CONSISTING ESSENTIALLY OF PARTICLES NOT SUBSTANTIALLY EXCEEDING FIVE MICRONS DIAMETER, THE RATIO OF HARCOAL TO TOTAL POLYMER SOLIDS BEING FROM 2:1 TO 8:1 BY WEIGHT AND THE RATIO OF SAID BUTADIENE-STYRENE COPOLYMER TO SAID STYRENE-MONOSECONDARY BUTYL MALEATE COPOLYMER BEING FROM 4:1 TO 1:5 BY WEIGHT, WHEREBY CLOTH THAT HAS BEEN IMPREGNATED WITH SAID COMPOSITION AND THEREAFTER DIRED IS RESISTANT TO DRY ABRASION AND TO WET ABRASION WITH WATER BUT STRIPPABLE BY LAUNDERING IN ALKALINE DETERGENTS.
Claim 2
Dependent Claim
125 words
A COMPOSITION FOR RENDERING CLOTH RESISTANT TO TOXIC GASES AND LIQUIDS CONSISTING ESSENTIALLY OF AN AQUEOUS AMMONIACAL SUSPENSION OF FINELY DIVIDED ACTIVATED CHARCOAL, AN EMULSIFIED BUTADIENE-STYRENE COPLYMER, AND AT LEAST ONE COPOLYMER OF STYRENE AND MONOSECONDARY BUTYL MALEATE, SAID CHARCOAL CONSTITUTING FROM 5 TO 25 PERCENT OF SAID COMPOSITION AND CONSISTING ESSENTIALLY OF PARTICLES NOT SUBSTANTIALLY EXCEEDING FIVE MICRONS DIAMETER, THE RATIO OF HARCOAL TO TOTAL POLYMER SOLIDS BEING FROM 2:1 TO 8:1 BY WEIGHT AND THE RATIO OF SAID BUTADIENE-STYRENE COPOLYMER TO SAID STYRENE-MONOSECONDARY BUTYL MALEATE COPOLYMER BEING FROM 4:1 TO 1:5 BY WEIGHT, WHEREBY CLOTH THAT HAS BEEN IMPREGNATED WITH SAID COMPOSITION AND THEREAFTER DIRED IS RESISTANT TO DRY ABRASION AND TO WET ABRASION WITH WATER BUT STRIPPABLE BY LAUNDERING IN ALKALINE DETERGENTS.
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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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |