Patent US2944066A successfully refreshed from Google Patents.
US2944066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of
Assignee: —
•
Filing: —
•
Granted: 1960-07-05
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Expires: 1977-07-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:25
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/18; C07D307/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PROCESS FOR THE PRODUCTION OF 3-KETOTETRAHYDROFURAN WHICH COMPRISES HEATING THE CIS ISOMER OF 3-CHLORO4-HYDROXY-TETRAHYDROFURAN IN THE PRESENCE OF A METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF SILVER OXIDE, CUPROUS OXIDE, MERCURIC OXIDE AND A MIXTURE OF SILVER OXIDE AND CUPROUS OXIDE.
Claim 2
Dependent Claim
43 words
A PROCESS FOR THE PRODUCTION OF 3-KETOTETRAHYDROFURAN WHICH COMPRISES HEATING THE CIS ISOMER OF 3-CHLORO4-HYDROXY-TETRAHYDROFURAN IN THE PRESENCE OF A METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF SILVER OXIDE, CUPROUS OXIDE, MERCURIC OXIDE AND A MIXTURE OF SILVER OXIDE AND CUPROUS OXIDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |