Patent US3115504A successfully refreshed from Google Patents.
US3115504A
Expired / Lapsed
US
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Method for production of furfural
Assignee: Valmet AB
•
Filing: 1960-02-10
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Granted: 1963-12-24
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Expires: 1980-02-10
Abstract
No abstract record available.
Inventors
- 👤 Asplund Arne Johan Arthur
- 👤 Scholz Horst Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:31
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/40; C07D307/46; C07D307/48; C07D307/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1040842A
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US1092800A
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US1735084A
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US1919878A
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US2059435A
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US1960812A
Cited
GB585772A
Cited
US2818413A
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GB808119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-23 | 1967-06-24 | 1967-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-23 | 1971-06-24 | 1971-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-23 | 1975-06-24 | 1975-12-24 | $7700.00 | Window Closed / Lapsed |