US2646449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorocarbon compounds and preparation of same
Assignee: EIDP Inc
•
Filing: 1950-06-29
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Granted: 1953-07-21
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Expires: 1970-06-29
Abstract
No abstract record available.
Inventors
- 👤 Carnahan James Elliot
- 👤 Sampson Herman Julian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:06
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; A; A01; A01N; A01N33/00; A01N33/02; A01N33/04; Y; Y10; Y10S; Y10S526/00; Y10S526/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A FLUOROCARBON COMPOUND FROM THE GROUP CONSISTING OF THE PRIMARY POLYFLUOROALKYL AMINES HAVING THE FORMULA H(CF2)NCH2NH2 WHEREIN N IS AN EVEN INTEGER FROM 6 TO 12, INCLUSIVE, AND THE WATER-SOLUBLE ACID SALTS THEREOF.
Claim 2
Dependent Claim
33 words
A FLUOROCARBON COMPOUND FROM THE GROUP CONSISTING OF THE PRIMARY POLYFLUOROALKYL AMINES HAVING THE FORMULA H(CF2)NCH2NH2 WHEREIN N IS AN EVEN INTEGER FROM 6 TO 12, INCLUSIVE, AND THE WATER-SOLUBLE ACID SALTS THEREOF.
References Cited (Backward Citations)
GB583874A
Cited
US2515246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |