US2711977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for impregnating sponge rubber made from frothed rubber latex
Assignee: Uniroyal Inc
•
Filing: 1952-11-22
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Granted: 1955-06-28
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Expires: 1972-11-22
Abstract
No abstract record available.
Inventors
- 👤 Paul V Butsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:15
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30; C08J9/36; C08J9/40; C08J9/42; C08L; C08L21/00; C08J2321/00; C08J2321/02; C08J2403/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD OF INCREASING THE LOAD SUPPORTING CAPACITY OF A FROTHED RUBBER LATEX SPONGE WHICH COMPRISES IMPREGNATING THE SPONGE WITH A 0.1% TO 10% WEIGHT CONCENTRATION OF STARCH IN AN AQUEOUS MEDIUM WHICH ALSO CONTAINS 10% TO 40% BY WEIGHT OF ALKALI-METAL HYDROXIDE BASED ON THE WEIGHT OF THE STARCH, THE AQUEOUS MEDIUM CONTAINING THE STARCH AND ALKALI-METAL HYDROXIDE BEING PRESENT IN THE SPONGE IN AMOUNT FROM 25% TO 200% BASED ON THE DRY WEIGHT OF THE SPONGE, AND DRYING THE THUS TREATED SPONGE.
Claim 2
Independent Claim
84 words
THE METHOD OF INCREASING THE LOAD SUPPORTING CAPACITY OF A FROTHED RUBBER LATEX SPONGE WHICH COMPRISES IMPREGNATING THE SPONGE WITH A 0.1% TO 10% WEIGHT CONCENTRATION OF STARCH IN AN AQUEOUS MEDIUM WHICH ALSO CONTAINS 10% TO 40% BY WEIGHT OF ALKALI-METAL HYDROXIDE BASED ON THE WEIGHT OF THE STARCH, THE AQUEOUS MEDIUM CONTAINING THE STARCH AND ALKALI-METAL HYDROXIDE BEING PRESENT IN THE SPONGE IN AMOUNT FROM 25% TO 200% BASED ON THE DRY WEIGHT OF THE SPONGE, AND DRYING THE THUS TREATED SPONGE.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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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) | 1958-06-27 | 1958-12-27 | 1959-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-27 | 1962-12-27 | 1963-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-27 | 1966-12-27 | 1967-06-28 | $7700.00 | Window Closed / Lapsed |