US2746939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of cellular articles
Assignee: Monsanto Chemicals Ltd
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Filing: 1951-03-30
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Granted: 1956-05-22
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Expires: 1971-03-30
Abstract
No abstract record available.
Inventors
- 👤 David J Beaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:21
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/08; C08L; C08L21/00; C08J2321/00; C08J2321/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE PROCESS OF PRODUCING CHEMICALLY BLOWN SPONGE RUBBER WHICH COMPRISES HEATING A SULFUR VULCANIZABLE RUBBER AND SULFUR IN THE PRESENCE OF AT LEAST 5% BY WEIGHT ON THE RUBBER OF A GAS GENERATING AGENT CONSISTING ESSENTIALLY OF A COMPOSITION OBTAINED BY HEATING BELOW THE DECOMPOSITION POINT AN ADMIXTURE OF 23-80 PARTS BY WEIGHT OF MALEIC ANHYDRIDE AND 77-20 PARTS BY WEIGHT OF A RUBBER VULCANIZATION ACCELERATOR HAVING A CARBON ATOM LINKED TO TWO SULFUR ATOMS AND A NITROGEN ATOM OF THE CLASS CONSISTING OF THIAZOLES, THIURAM SULFIDES AND DITHIOCARBAMATES.
Claim 2
Dependent Claim
89 words
THE PROCESS OF PRODUCING CHEMICALLY BLOWN SPONGE RUBBER WHICH COMPRISES HEATING A SULFUR VULCANIZABLE RUBBER AND SULFUR IN THE PRESENCE OF AT LEAST 5% BY WEIGHT ON THE RUBBER OF A GAS GENERATING AGENT CONSISTING ESSENTIALLY OF A COMPOSITION OBTAINED BY HEATING BELOW THE DECOMPOSITION POINT AN ADMIXTURE OF 23-80 PARTS BY WEIGHT OF MALEIC ANHYDRIDE AND 77-20 PARTS BY WEIGHT OF A RUBBER VULCANIZATION ACCELERATOR HAVING A CARBON ATOM LINKED TO TWO SULFUR ATOMS AND A NITROGEN ATOM OF THE CLASS CONSISTING OF THIAZOLES, THIURAM SULFIDES AND DITHIOCARBAMATES.
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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |