Patent US2527512A successfully refreshed from Google Patents.
US2429439A
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US
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Method of producing butadiene styrene copolymer reinforced with calcium silicate
Assignee: Goodrich Corp
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Filing: 1945-01-20
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Granted: 1947-10-21
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Expires: 1965-01-20
Abstract
No abstract record available.
Inventors
- 👤 Jerome C Westfahl
- 👤 Daniel S Sears
- 👤 John W Martindale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:29
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C08K; C08K3/00; C08K3/34; C08J2309/00; C08J2309/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1953972A
Cited
US2367629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-20 | 1951-04-21 | 1951-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-20 | 1955-04-21 | 1955-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-20 | 1959-04-21 | 1959-10-21 | $7700.00 | Window Closed / Lapsed |