US3179640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxyfluoroalkyl-substituted styrenes, their polymers and their preparation
Assignee: EIDP Inc
•
Filing: 1962-09-28
•
Granted: 1965-04-20
•
Expires: 1982-09-28
Abstract
No abstract record available.
Inventors
- 👤 William J Middleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:02
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/14; C08F12/22; C08F12/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
6 words
A FLUORINATED STYRENE OF THE FORMULA
Claim 2
Dependent Claim
6 words
A FLUORINATED STYRENE OF THE FORMULA
Claim 3
Dependent Claim
8 words
A POLYMER OF A STYRENE OF CLAIM 1.
References Cited (Backward Citations)
US2580504A
Cited
US3057932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |