Patent US2642416A successfully refreshed from Google Patents.
US2642416A
Expired / Lapsed
US
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Fluorinated acrylates and polymers
Assignee: 3M Co
•
Filing: 1952-01-09
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Granted: 1953-06-16
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Expires: 1972-01-09
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Ahlbrecht
- 👤 Thomas S Reid
- 👤 Donald R Husted
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:10
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/22; C08F20/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
AS NEW COMPOUNDS, THE 1,1-DIHYDROPERFLUOROALKYL ACRYLATES HAVING THE FORMULA:
Claim 2
Dependent Claim
9 words
AS NEW COMPOUNDS, THE 1,1-DIHYDROPERFLUOROALKYL ACRYLATES HAVING THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |