Patent USRE26171E successfully refreshed from Google Patents.
US2643987A
Expired / Lapsed
US
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Preparation of mixtures of rubbery butadiene styrene copolymer with hard resinous saturated copolymer of styrene and another unsaturated compound
Assignee: Goodrich Corp
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Filing: 1952-01-05
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Granted: 1953-06-30
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Expires: 1972-01-05
Abstract
No abstract record available.
Inventors
- 👤 Stuart A Harrison
- 👤 Walter E Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:46
CPC Classifications
C; C08; C08F; C08F257/00; C08F257/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2257078A
Cited
US2388685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |