US3006868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing foamed rubbers
Assignee: Crusader Chemical Co Inc
•
Filing: 1957-08-30
•
Granted: 1961-10-31
•
Expires: 1977-08-30
Abstract
No abstract record available.
Inventors
- 👤 Stamberger Paul
- 👤 Walter M Fuchs
- 👤 Frieda W Fuchs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:22
CPC Classifications
C; C08; C08L; C08L21/00; B; B01; B01J; B01J13/00; C08J; C08J9/00; C08J9/0014; C08J9/0028; C08L75/00; C08L75/04; C08J2321/00; C08J2321/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN THE METHOD OF PREPARING A FOAMED LATEX SPONGE RUBBER ARTICLE WHEREIN AIR IS BEATEN INTO A NEGATIVELY CHARGED RUBBER LATEX DISPERSION SO AS TO FORM A FOAM AND THE FOAM IS THEN GELLED TO A SOLID WITH AN ALKALI METAL SILICO-FLUORIDE GELLING AGENT, THE IMPROVEMENT WHICH CONSISTS IN INCREASING THE SPEED OF GELATION AND DECREASING THE TENDENCY OF THE FOAM TO SHRINK ON GELATION BY THOROUGHLY MIXING INTO THE LATEX DISPERSION, PRIOR TO FOAMING, A STABLE AQUEOUS DISPERSION OF A WATER INSOLUBLE GERMICIDAL QUATERNARY AMMONIUM SALT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ROSIN ACIDS AND THE SATURATED AND UNSATURATED SOAP-FORMING ACIDS CONTAINING FROM 12 TO 18 CARBON ATOMS WHICH ORGANIC QUATERNARY AMMONIUM COMPOUND IS FURTHER CHARACTERIZED BY HAVING AT LEAST THREE CARBON ATOMS DIRECTLY BONDED TO THE QUATERNARY NITROGEN ATOM, ONE OF SAID CARBON ATOMS BEING PART OF AN ALIPHATIC CHAIN OF AT LEAST TEN CARBON ATOMS.
Claim 2
Dependent Claim
151 words
IN THE METHOD OF PREPARING A FOAMED LATEX SPONGE RUBBER ARTICLE WHEREIN AIR IS BEATEN INTO A NEGATIVELY CHARGED RUBBER LATEX DISPERSION SO AS TO FORM A FOAM AND THE FOAM IS THEN GELLED TO A SOLID WITH AN ALKALI METAL SILICO-FLUORIDE GELLING AGENT, THE IMPROVEMENT WHICH CONSISTS IN INCREASING THE SPEED OF GELATION AND DECREASING THE TENDENCY OF THE FOAM TO SHRINK ON GELATION BY THOROUGHLY MIXING INTO THE LATEX DISPERSION, PRIOR TO FOAMING, A STABLE AQUEOUS DISPERSION OF A WATER INSOLUBLE GERMICIDAL QUATERNARY AMMONIUM SALT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ROSIN ACIDS AND THE SATURATED AND UNSATURATED SOAP-FORMING ACIDS CONTAINING FROM 12 TO 18 CARBON ATOMS WHICH ORGANIC QUATERNARY AMMONIUM COMPOUND IS FURTHER CHARACTERIZED BY HAVING AT LEAST THREE CARBON ATOMS DIRECTLY BONDED TO THE QUATERNARY NITROGEN ATOM, ONE OF SAID CARBON ATOMS BEING PART OF AN ALIPHATIC CHAIN OF AT LEAST TEN CARBON ATOMS.
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) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |