US2559629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyfluoroalkanoic compounds and their preparation
Assignee: EIDP Inc
•
Filing: 1948-12-13
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Granted: 1951-07-10
•
Expires: 1968-12-13
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:04
CPC Classifications
C; C07; C07C; C07C53/00; C07C53/15; C07C53/19; C07C53/21; C07C51/00; C07C51/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A POLYFLUOROALKANIC COMPOUND HAVING THE FORMULA H(CX2CX2)NCOOM WHEREIN THE X SUBSTITUENTS ARE HALOGEN ATOMS OF ATOMIC WEIGHT BELOW 40 AND AT LEAST HALF OF THE HALOGEN ATOMS IN EACH CX2CX2 GROUP ARE FLUORINE, N IS A POSITIVE INTERGER FROM 3 TO 10 INCLUSIVE AND M IS A MEMBER OF THE CLASS CONSISTING OF HYDROGEN, AMMONIUM AND METAL CATIONS.
Claim 2
Dependent Claim
58 words
A POLYFLUOROALKANIC COMPOUND HAVING THE FORMULA H(CX2CX2)NCOOM WHEREIN THE X SUBSTITUENTS ARE HALOGEN ATOMS OF ATOMIC WEIGHT BELOW 40 AND AT LEAST HALF OF THE HALOGEN ATOMS IN EACH CX2CX2 GROUP ARE FLUORINE, N IS A POSITIVE INTERGER FROM 3 TO 10 INCLUSIVE AND M IS A MEMBER OF THE CLASS CONSISTING OF HYDROGEN, AMMONIUM AND METAL CATIONS.
References Cited (Backward Citations)
GB452579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |