US3321531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated benzyl ether polymers and process for their preparation
Assignee: Individual
•
Filing: 1962-09-13
•
Granted: 1967-05-23
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Expires: 1982-09-13
Abstract
No abstract record available.
Inventors
- 👤 Haszeldine Robert Neville
- 👤 Birchall John Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:11
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/10; C07C17/14; C07C17/26; C07C17/263; C08; C08G; C08G65/00; C08G65/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A POLYMER CONSISTING ESSENTIALLY OF A CHAIN OF FROM 2 TO ABOUT 10,000 REPEATING UNITS HAVING THE FORMULA
Claim 2
Dependent Claim
18 words
A POLYMER CONSISTING ESSENTIALLY OF A CHAIN OF FROM 2 TO ABOUT 10,000 REPEATING UNITS HAVING THE FORMULA
References Cited (Backward Citations)
GB269973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |