Patent US2654680A successfully refreshed from Google Patents.
US2654680A
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Method for increasing stability of rubbery polymer reaction products and resulting compositions
Assignee: Shell Development Co
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Filing: 1949-04-26
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Granted: 1953-10-06
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Expires: 1969-04-26
Abstract
No abstract record available.
Inventors
- 👤 Goppel Johan Michael
- 👤 Rumscheidt Gottfried Ernst
- 👤 Hackmann Johannes Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:26
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
A NOVEL COMPOSITION OF MATTER COMPRISING A REACTION PRODUCT OF SULFUR DIOXIDE WITH A RUBBERY POLYMER OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF CONJUGATED DIOLEFINS AND CHLOROPRENE, THESE BEING THE ONLY REACTANTS, WHICH REACTION PRODUCT IS IMPREGNATED WITH A STABILIZER SELECTED FROM THE GROUP CONSISTING OF GUANYL-SUBSTITUTED CYANAMIDES, GUANYL-SUBSTITUTED HYDROCARBONS AND DI-HYDROCARBON-SUBSTITUTED CARBODIMIDES.
References Cited (Backward Citations)
US2387518A
Cited
US2379354A
Cited
US2469847A
Cited
US2367483A
Cited
GB593036A
Cited
US2583370A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |