US4570004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluoro crown ethers
Assignee: Victor Company of Japan Ltd
•
Filing: 1984-04-06
•
Granted: 1986-02-11
•
Expires: 2004-04-06
Abstract
Abstract This specification discloses novel perfluorinated crown ethers which are believed useful as oxygen carriers and in the construction of various biomedical products.
Inventors
- 👤 Richard J. Lagow
- 👤 Wen-Huey Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:08
CPC Classifications
C; C07; C07D; C07D323/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
20 words
Perfluorinated crown ethers comprising the repeating unit (--O--CF 2 --CF 2 --) n , where n is at least 3.
Claim 2
Dependent Claim
20 words
Perfluorinated crown ethers comprising the repeating unit (--O--CF 2 --CF 2 --) n , where n is at least 3.
Claim 3
Dependent Claim
15 words
The perfluorinated crown ethers of claim 1, where n is between 3 and 7, inclusive.
Claim 4
Dependent Claim
3 words
Perfluoro 12-crown-4 ether.
Claim 5
Dependent Claim
3 words
Perfluoro 12-crown-4 ether.
Claim 6
Dependent Claim
3 words
Perfluoro 15-crown-5 ether.
Claim 7
Dependent Claim
3 words
Perfluoro 15-crown-5 ether.
Claim 8
Dependent Claim
3 words
Perfluoro 18-crown-6 ether.
Claim 9
Dependent Claim
3 words
Perfluoro 18-crown-6 ether.
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) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |