Patent US4768505A successfully refreshed from Google Patents.
US2429329A
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Thermosetting plastic from redwood pulp and furfuryl alcoholformaldehyde resin
Assignee: Lawrence University
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Filing: 1944-03-20
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Granted: 1947-10-21
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Expires: 1964-03-20
Abstract
No abstract record available.
Inventors
- 👤 Reineck Edward
- 👤 Isaac R Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:22
CPC Classifications
C; C08; C08L; C08L97/00; C08L97/02; C08L61/00; C08L97/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2192129A
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US1899768A
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US2033411A
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US2080078A
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US2306924A
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US2310010A
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US2367312A
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US2343973A
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US2343972A
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US2380214A
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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) | 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 |