US2795591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound and process for drying tetrahydrofuran
Assignee: EIDP Inc
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Filing: 1953-02-25
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Granted: 1957-06-11
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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
2026-10-30 19:15
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/06; C07D307/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
THE METHOD OF DEHYDRATING THE TETRAHYDROFURANWATER AZEOTROPE WHICH COMPRISES CONTACTING SAID AZEOTROPE WITH THE SOLID ADDITION PRODUCT OF CALCIUM CHLORIDE, TETRAHYDROFURAN AND WATER HAVING THE FORMULA
Claim 2
Independent Claim
26 words
THE METHOD OF DEHYDRATING THE TETRAHYDROFURANWATER AZEOTROPE WHICH COMPRISES CONTACTING SAID AZEOTROPE WITH THE SOLID ADDITION PRODUCT OF CALCIUM CHLORIDE, TETRAHYDROFURAN AND WATER HAVING THE FORMULA
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) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |