US3553115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber mixtures
Assignee: BASF Schweiz AG
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Filing: 1968-11-14
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Granted: 1971-01-05
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Expires: 1988-11-14
Abstract
Abstract LIGHT-COLORED, TECHNICALLY VALUABLE VULCANISATES ARE OBTAINED ACCORDING TO THE INVENTION WHEN NATURAL OR SYNTHETIC RUBBER IS VULCANISED IN THE PRESENCE OF INSOLUBLE AND INFUSIBLE, FINELY DISPERSED AMINOPLASTS HAVING AN INNER SURFACE OF MORE THAN 10 SQUARE METERS PER GRAM AND AN AVERAGE PARTICLE SIZE SMALLER THAN 5U.
Inventors
- 👤 Jean Curchod
- 👤 Roland Cheritat
- 👤 Franz Rudolf Widmer
- 👤 Gustav Widmer
- 👤 Alfred Renner Muenchenstein
- 👤 Hans Batzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:11
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/30; C08G12/32; C08G12/04; C08G12/10; C08G12/12; C08L; C08L21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |