US3268458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making microporous rubber sheet material
Assignee: ESB RCEVES CORP
•
Filing: 1963-02-04
•
Granted: 1966-08-23
•
Expires: 1983-02-04
Abstract
No abstract record available.
Inventors
- 👤 Howard J Strauss
- 👤 Weiss Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:27
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/26; C08J2201/00; C08J2201/04; C08J2201/046; C08J2321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
THE METHOD OF MAKING MICROPOROUS RUBBER SHEET MATERIAL WHICH COMPRISES DISPERSING A VEGETABLE STARCH IN WATER, ADDING THE RESULTING STARCH DISPERSION TO A RUBBER LATEX, MIXING THE LATEX AND STARCH DISPERSION WITH AN AQUEOUS DISPERSION FROM THE GROUP OF SODIUM SILICOFLUORIDE AND POTASSOUM SILICOFLUORIDE WHILE MINIMIZING FOAMING OF THE MIXTURE, SPREADING THE MIXTURE ON A SURFACE AND PERMITTING THE MIXTURE TO GEL IRREVERSITY TO FORM A SHEET HAVING A SKELETON OF RUBBER IN THE SHEET, SUBJECTING THE RU TEMPERATURE BELOW THAT AT WHICH THE STARCH IS GELATINIZED TO AVOID CRACKING OF THE SKELETION OF RUBBER GEL, THEREAFTER CURING THE RUBBER IN THE SHEET, SUBJECTING THE RUBBER SHEET TO MECHANICAL ROLLING TO IMPROVE COMMUNICATION OF THE STARCH PARTICLES, BOILING THE RUBBER SHEET IN WATER, REMOVING THE STARCH FROM THE RUBBER SHEET, AND DRYING THE RUBBER SHEET AT A TEMPERATURE AND RATE WHICH PERMITS THE VAPOR FROM THE INSIDE OF THE SHEET TO ESCAPE SLOWLY IN AVOIDANCE OF SURFACE CRACKING OF THE RESULTING MICRPOPOROUS RUBBER SHEET.
Claim 2
Independent Claim
164 words
THE METHOD OF MAKING MICROPOROUS RUBBER SHEET MATERIAL WHICH COMPRISES DISPERSING A VEGETABLE STARCH IN WATER, ADDING THE RESULTING STARCH DISPERSION TO A RUBBER LATEX, MIXING THE LATEX AND STARCH DISPERSION WITH AN AQUEOUS DISPERSION FROM THE GROUP OF SODIUM SILICOFLUORIDE AND POTASSOUM SILICOFLUORIDE WHILE MINIMIZING FOAMING OF THE MIXTURE, SPREADING THE MIXTURE ON A SURFACE AND PERMITTING THE MIXTURE TO GEL IRREVERSITY TO FORM A SHEET HAVING A SKELETON OF RUBBER IN THE SHEET, SUBJECTING THE RU TEMPERATURE BELOW THAT AT WHICH THE STARCH IS GELATINIZED TO AVOID CRACKING OF THE SKELETION OF RUBBER GEL, THEREAFTER CURING THE RUBBER IN THE SHEET, SUBJECTING THE RUBBER SHEET TO MECHANICAL ROLLING TO IMPROVE COMMUNICATION OF THE STARCH PARTICLES, BOILING THE RUBBER SHEET IN WATER, REMOVING THE STARCH FROM THE RUBBER SHEET, AND DRYING THE RUBBER SHEET AT A TEMPERATURE AND RATE WHICH PERMITS THE VAPOR FROM THE INSIDE OF THE SHEET TO ESCAPE SLOWLY IN AVOIDANCE OF SURFACE CRACKING OF THE RESULTING MICRPOPOROUS RUBBER SHEET.
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |