US3310508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixture for improving the chemico-physical properties of blends consisting of natural rubber and 1:4-cis-polybutadiene
Assignee: Metzeler Gummiwerke AG
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Filing: 1963-07-18
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Granted: 1967-03-21
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Expires: 1983-07-18
Abstract
No abstract record available.
Inventors
- 👤 Hrischikesch C Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:51
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/32; C08K5/33; C08K5/36; C08L; C08L21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3060989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |