US2790813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safe recovery of tetrahydrofuran vapors
Assignee: EIDP Inc
•
Filing: 1953-02-25
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Granted: 1957-04-30
•
Expires: 1973-02-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul F Bente
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:04
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/06; C07D307/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
THE METHOD OF INHIBITING THE FORMATING OF PEROXIDES IN TETRAHYDROFURAN WHICH COMPRISES CONTACTING SAID TERAHYDROFURAN WITH A FINELY DIVIDED INERT CARRIER CONTAINING 10 TO 10,000P.P.M. OF A METAL CHOSEN FROM THE GROUP CONSISTING OF IRON, COBALT AND NICKEL.
Claim 2
Independent Claim
38 words
THE METHOD OF INHIBITING THE FORMATING OF PEROXIDES IN TETRAHYDROFURAN WHICH COMPRISES CONTACTING SAID TERAHYDROFURAN WITH A FINELY DIVIDED INERT CARRIER CONTAINING 10 TO 10,000P.P.M. OF A METAL CHOSEN FROM THE GROUP CONSISTING OF IRON, COBALT AND NICKEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |