US2549864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous process for making sponge rubber
Assignee: Commonwealth Engineering Company of Ohio
•
Filing: 1948-06-12
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Granted: 1951-04-24
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Expires: 1968-06-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Toulmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:24
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/30; B29K; B29K2021/00; B29K2105/00; B29K2105/0058; B29K2105/0064; Y; Y10; Y10S; Y10S521/00; Y10S521/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A CONTINUOUS PROCESS FOR MAKING SPONGE RUBBER, THE STEPS OF IMPREGNATING A MIXTURE OF A RUBBER LATEX AND SUBSTANTIALLY 2.25% OF SODIUM SILICATE WITH NITROUS OXIDE GAS, ALLOWING SAID GAS TO EXPAND WHEREBY SAID LATEX IS CONVERTED INTO A FOAM STABLE IN THE AIR AND UNDER CURING CONDITIONS, CURING SAID FOAM INTO A SPONGE MATERIAL, AND CONTINUOUSLY REPLACING SAID CURED SPONGE BY A NEW SUPPLY OF LATEX FOAM.
Claim 2
Dependent Claim
69 words
IN A CONTINUOUS PROCESS FOR MAKING SPONGE RUBBER, THE STEPS OF IMPREGNATING A MIXTURE OF A RUBBER LATEX AND SUBSTANTIALLY 2.25% OF SODIUM SILICATE WITH NITROUS OXIDE GAS, ALLOWING SAID GAS TO EXPAND WHEREBY SAID LATEX IS CONVERTED INTO A FOAM STABLE IN THE AIR AND UNDER CURING CONDITIONS, CURING SAID FOAM INTO A SPONGE MATERIAL, AND CONTINUOUSLY REPLACING SAID CURED SPONGE BY A NEW SUPPLY OF LATEX FOAM.
References Cited (Backward Citations)
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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) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |