US3652468A
Expired / Lapsed
US
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Reinforced rubber compositions
Assignee: Semperit AG Holding
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Filing: 1968-06-03
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Granted: 1972-03-28
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Expires: 1988-06-03
Abstract
Abstract DISCLOSED IS A PROCESS FOR THE MANFACTURING OF VULCANIZED REINFORCED RUBBER COMPOSITIONS HAVING SUPERIOR MECHANICAL PROPERTIES AND GOOD PROCESSABILITY. THE PROCESS COMPRISES STEPS OF INCORPORATING INTO A RAW RUBBER COMPOSITION, PRIOR TO ITS VULCANIZATION, AN ACTIVE HYDROGEN CONTAINING COMPOUND WHICH WILL POLYMERIZE TO FORM A POLYURETHANE, AND THEN VULCANIZING AND POLYMERIZING THE RESULTING MIXTURE TO FORM A POLYURETHANE LATTICE REINFORCED RUBBER COMPOSITION.
Inventors
- 👤 Johann Schwab
- 👤 Robert Grill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:27
CPC Classifications
C; C08; C08L; C08L21/00; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6204; C08G18/67; C08G18/69; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/06; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/0008; C08K5/0025; C08K5/04; C08K5/09; C08K5/14; C08K5/16; C08K5/29; C08L23/00; C08L23/02; C08L23/16; C08L71/00; C08L71/02; C08L75/00; C08L75/04; C08L9/00; C08L9/02; C08L91/00; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/14; C08L2666/20
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |