US3219600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing closed cell sponge rubber
Assignee: Johns Manville Corp
•
Filing: 1963-12-18
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Granted: 1965-11-23
•
Expires: 1983-12-18
Abstract
No abstract record available.
Inventors
- 👤 Howard L Rucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:53
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/32; C08J2321/00; Y; Y10; Y10S; Y10S264/00; Y10S264/06; Y10S525/00; Y10S525/942
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
THE METHOD OF PRODUCING CLOSED CELL, GAS EXPANDED VULCANIZED RUBBER PRODUCTS CONSISTING OF PROVIDING CLOSED CELLS WITHIN A BODY OF RUBBER AND EXPANDING THE MASS OF THE BODY OF RUBBER AT LEAST ABOUT 100% IN VOLUME, SAID METHOD COMPRISING THE STEPS OF COMBINING A VULCANIZABLE RUBBERY POLYMER OF DIOLEFINIC COMPOUNDS WITH A VULCANIZING AGENT AND APPROXIMATELY 2 TO 100% BY WEIGHT OF GAS FILLED BALLOONS BASED UPON THE WEIGHT OF THE RUBBER, THEN PLASTICIZING THE RUBBER AND EXPAND ING ITS MASS TO AT LEAST ABOUT 100% IN VOLUME AND VULCANIZING THE EXPANDED MASS OF RUBBER THROUGH THE APPLICATAION OF HEAT, SAID EXPANSION BEING EFFECTED THROUGH THE MEDIUM OF THE THERMALLY INDUCED PHYSICAL EXPANSION OF THE CONTENTS OF THE BALLOONS.
Claim 2
Independent Claim
119 words
THE METHOD OF PRODUCING CLOSED CELL, GAS EXPANDED VULCANIZED RUBBER PRODUCTS CONSISTING OF PROVIDING CLOSED CELLS WITHIN A BODY OF RUBBER AND EXPANDING THE MASS OF THE BODY OF RUBBER AT LEAST ABOUT 100% IN VOLUME, SAID METHOD COMPRISING THE STEPS OF COMBINING A VULCANIZABLE RUBBERY POLYMER OF DIOLEFINIC COMPOUNDS WITH A VULCANIZING AGENT AND APPROXIMATELY 2 TO 100% BY WEIGHT OF GAS FILLED BALLOONS BASED UPON THE WEIGHT OF THE RUBBER, THEN PLASTICIZING THE RUBBER AND EXPAND ING ITS MASS TO AT LEAST ABOUT 100% IN VOLUME AND VULCANIZING THE EXPANDED MASS OF RUBBER THROUGH THE APPLICATAION OF HEAT, SAID EXPANSION BEING EFFECTED THROUGH THE MEDIUM OF THE THERMALLY INDUCED PHYSICAL EXPANSION OF THE CONTENTS OF THE BALLOONS.
References Cited (Backward Citations)
US3062682A
Cited
US2945776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |