US2666797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated alcohols and acetate esters
Assignee: 3M Co
•
Filing: 1950-05-26
•
Granted: 1954-01-19
•
Expires: 1970-05-26
Abstract
No abstract record available.
Inventors
- 👤 Donald R Husted
- 👤 Arthur H Ahlbrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:25
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
AS NEW COMPOUNDS, THE 1,1-DIHYDROPERFLUOROALKYL ALCOHOLS, HAVING THE FORMULA:
Claim 2
Dependent Claim
9 words
AS NEW COMPOUNDS, THE 1,1-DIHYDROPERFLUOROALKYL ALCOHOLS, 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) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |