US2546868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making closed cell cellular soft rubber sheet by single vulcanization andexternal gassing
Assignee: Rubatex Products Inc
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Filing: 1947-10-14
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Granted: 1951-03-27
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Expires: 1967-10-14
Abstract
No abstract record available.
Inventors
- 👤 Pfleumer Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:14
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/122; B; B29; B29C; B29C44/00; B29C44/34; B29C44/3442; B29C44/3446; B29C44/3453; B29C44/3488; C08L; C08L21/00; C08J2201/00; C08J2201/02; C08J2201/032; C08J2205/00; C08J2205/04; C08J2205/052; C08J2321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
THE PROCESS OF PREPARING A SOFT CLOSED CELL CELLULAR SHEET COMPRISING THE STEPS OF PRE-CURING A SOFT RUBBER MIX TO FINAL VULCANIZED CONDITION, SUBJECTING THE VULCANIZED RUBBER TO GAS UNDER PRESSURE TO IMPREGNATE THE RUBBER WITH GAS, AND RELAXING THE PRESSURE TO PERMIT THE GASSED RUBBER TO EXPAND.
Claim 2
Dependent Claim
48 words
THE PROCESS OF PREPARING A SOFT CLOSED CELL CELLULAR SHEET COMPRISING THE STEPS OF PRE-CURING A SOFT RUBBER MIX TO FINAL VULCANIZED CONDITION, SUBJECTING THE VULCANIZED RUBBER TO GAS UNDER PRESSURE TO IMPREGNATE THE RUBBER WITH GAS, AND RELAXING THE PRESSURE TO PERMIT THE GASSED RUBBER TO EXPAND.
References Cited (Backward Citations)
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US1823335A
Cited
US2071647A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |