US2790789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of nu-substituted unsaturated acid amides
Assignee: Celanese Corp
•
Filing: 1950-05-27
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Granted: 1957-04-30
•
Expires: 1970-05-27
Abstract
No abstract record available.
Inventors
- 👤 Alfred L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:24
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
POLYMERIZED N-TERTIARY BUTYL ACRYLAMIDE.
Claim 2
Dependent Claim
4 words
POLYMERIZED N-TERTIARY BUTYL ACRYLAMIDE.
References Cited (Backward Citations)
US2311548A
Cited
US2288197A
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US2508717A
Cited
US2576839A
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US2560680A
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US2541465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |