US2661306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of rubberizing hollow articles of fibrous material
Assignee: Individual
•
Filing: 1950-06-16
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Granted: 1953-12-01
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Expires: 1970-06-16
Abstract
No abstract record available.
Inventors
- 👤 Duarry-Serra Juan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:24
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/38
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
A METHOD FOR RUBBERIZING THE INNER WALLS OF HOLLOW ARTICLES MADE OF PERMEABLE FIBROUS MATERIAL HAVING PORES AND INTERSTICES COMPRISING THE STEPS OF MOISTENING THE OUTER WALLS OF A HOLLOW ARTICLE, FILLING IT WITH A PREDETERMINED AMOUNT OF AN AQUEOUS RUBBER DISPERSION, INFLATING THE ARTICLE, CLOSING IT, TURNING THE INFLATED ARTICLE TO CAUSE THE DESIRED DISTRIBUTION OF THE RUBBER DISPERSION OF THE INNER WALLS, OPENING THE ARTICLE AND INJECTING CARBON DIOXIDE GAS UNDER PRESSURE, THEREBY CAUSING COAGULATION OF THE RUBBER DISPERSION ON THE INNER WALLS AND FORCING THE DISPERSING MEDIUM UNDER PRESSURE OUTWARDLY THROUGH THE PORES OF THE FIBROUS MATERIAL, AND THEN HEATING THE ARTICLE WHILE MAINTAINING THE INNER GAS RESSURE.
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) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |