Patent US2806866A successfully refreshed from Google Patents.
US2806866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hoocxcfcix
Assignee: —
•
Filing: —
•
Granted: 1957-09-17
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Expires: 1974-09-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:20
CPC Classifications
C; C07; C07C; C07C55/00; C07C55/32; C07C53/00; C07C53/15; C07C53/19; C07C53/21
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
15 words
A NOVEL POLYHALOGENATED FLUORINE-CONTAINING CARBOXYLIC COMPOUND OF THE GROUP CONSISTING OF ACIDS HAVING THE FORMULA
Claim 2
Dependent Claim
15 words
A NOVEL POLYHALOGENATED FLUORINE-CONTAINING CARBOXYLIC COMPOUND OF THE GROUP CONSISTING OF ACIDS HAVING THE FORMULA
Claim 3
Independent Claim
30 words
A METHOD OF PREPARING A NOVEL FLUORINATED ACID WHICH COMPRISES TREATING WITH FUMING SULFURIC ACID AT A TEMPERATURE BETWEEN ABOUT 140*C. AND ABOUT 300*C., A FLUORINE-CONTAINING TELOMER, HAVING THE FORMULA
Claim 4
Independent Claim
30 words
A METHOD OF PREPARING A NOVEL FLUORINATED ACID WHICH COMPRISES TREATING WITH FUMING SULFURIC ACID AT A TEMPERATURE BETWEEN ABOUT 140*C. AND ABOUT 300*C., A FLUORINE-CONTAINING TELOMER, 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) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |