Patent US2670928A successfully refreshed from Google Patents.
US3418337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hexafluoro-2-propanol and its complex with tetrahydrofuran
Assignee: EIDP Inc
•
Filing: 1964-03-27
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Granted: 1968-12-24
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Expires: 1984-03-27
Abstract
No abstract record available.
Inventors
- 👤 William J Middleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:48
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/095; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/07; C08J2359/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
1 words
2H-HEXAFLUORO-2-PROPANOL.
Claim 2
Dependent Claim
1 words
2H-HEXAFLUORO-2-PROPANOL.
Claim 3
Dependent Claim
10 words
A COMPLEX OF THE COMPOUND OF CLAIM 1 WITH TETRAHYDROFURAN.
References Cited (Backward Citations)
US2921940A
Cited
US3051744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |