US2945826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of foamed rubber latex containing gelatinized starch
Assignee: Hairlok Co Ltd
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Filing: 1955-11-03
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Granted: 1960-07-19
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Expires: 1975-11-03
Abstract
No abstract record available.
Inventors
- 👤 Lilian F Everett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:39
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; B; B29; B29D; B29D23/00; B29D23/18; C08J; C08J9/00; C08J9/0061; C08L21/00; C08L77/00; C08J2321/00; C08J2403/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF PRODUCING A FOAM RUBBER WHICH COMPRISES PROVIDING A FOAMABLE AND COAGULABLE LIQUID MIX CONTAINING RUBBER IN SUSPENSION, ADDING TO THE MIX FROM ABOUT 1 TO 8% OF A FINELY-DIVIDED UNGELANTINIZED STARCH BASED ON THE TOTAL WEIGHT OF THE SOLID INGREDIENTS, FORMING THE MIX INTO A FOAM, SETTING THE FOAM TO FORM A COAGULATED CELLULAR MASS AT TEMPERATURES INSUFFICIENT TO CAUSE THE GELATINIZATION OF THE STARCH, AND THEREAFTER HEATING THE MASS TO A TEMPERATURE SUFFICIENT TO CAUSE BURSTING OF THE STARCH GRAINS AND GELATINIZATION OF THE STARCH.
Claim 2
Independent Claim
89 words
A METHOD OF PRODUCING A FOAM RUBBER WHICH COMPRISES PROVIDING A FOAMABLE AND COAGULABLE LIQUID MIX CONTAINING RUBBER IN SUSPENSION, ADDING TO THE MIX FROM ABOUT 1 TO 8% OF A FINELY-DIVIDED UNGELANTINIZED STARCH BASED ON THE TOTAL WEIGHT OF THE SOLID INGREDIENTS, FORMING THE MIX INTO A FOAM, SETTING THE FOAM TO FORM A COAGULATED CELLULAR MASS AT TEMPERATURES INSUFFICIENT TO CAUSE THE GELATINIZATION OF THE STARCH, AND THEREAFTER HEATING THE MASS TO A TEMPERATURE SUFFICIENT TO CAUSE BURSTING OF THE STARCH GRAINS AND GELATINIZATION OF THE STARCH.
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) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |