US2512475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of latex foam sponge products
Assignee: Individual
•
Filing: 1947-06-30
•
Granted: 1950-06-20
•
Expires: 1967-06-30
Abstract
No abstract record available.
Inventors
- 👤 George T Bau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:16
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30; B; B29; B29K; B29K2105/00; B29K2105/04; C08J2321/00; C08J2321/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A PROCESS OF PRODUCING A LATEX FOAM SPONGE PRODUCT, THE STEPS WHICH COMPRISE: PREPARING A FROTHED LIQUID MIXTURE CONTAINING AIR BUBBLES AND COMPRISING LATEX AND ETHANOLAMINE SOAP, THE PROPORTION OF SAID ETHANOLAMINE SOAP BEING BETWEEN 1% AND ABOUT 10% BY WEIGHT OF THE RUBBER SOLIDS IN SAID LATEX; GELLING SAID LATEX AND SAID ETHANOLAMINE SOAP AROUND SAID BUBLES TO FORM A BODY OF SOLIDIFIED FROTH HAVING CLOSED AIR CELLS DISTRIBUTED THEREIN; AND HEATING SAID BODY IN A TIGHTLY SEALED SPACE TO CURE THE LATEX IN SAID BODY WHILE SUBSTANTIALLY COMPLETELY PREVENTING ESCAPE OF AIR FROM SAID BODY AND THEREBY MAINTAINING SAID AIR CELLS CLOSED DURING THE MAJOR PORTION OF THE LATEX CURING PERIOD.
Claim 2
Dependent Claim
114 words
IN A PROCESS OF PRODUCING A LATEX FOAM SPONGE PRODUCT, THE STEPS WHICH COMPRISE: PREPARING A FROTHED LIQUID MIXTURE CONTAINING AIR BUBBLES AND COMPRISING LATEX AND ETHANOLAMINE SOAP, THE PROPORTION OF SAID ETHANOLAMINE SOAP BEING BETWEEN 1% AND ABOUT 10% BY WEIGHT OF THE RUBBER SOLIDS IN SAID LATEX; GELLING SAID LATEX AND SAID ETHANOLAMINE SOAP AROUND SAID BUBLES TO FORM A BODY OF SOLIDIFIED FROTH HAVING CLOSED AIR CELLS DISTRIBUTED THEREIN; AND HEATING SAID BODY IN A TIGHTLY SEALED SPACE TO CURE THE LATEX IN SAID BODY WHILE SUBSTANTIALLY COMPLETELY PREVENTING ESCAPE OF AIR FROM SAID BODY AND THEREBY MAINTAINING SAID AIR CELLS CLOSED DURING THE MAJOR PORTION OF THE LATEX CURING PERIOD.
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) | 1953-06-19 | 1953-12-19 | 1954-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-19 | 1957-12-19 | 1958-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-19 | 1961-12-19 | 1962-06-20 | $7700.00 | Window Closed / Lapsed |