Patent US3256248A successfully refreshed from Google Patents.
US3256248A
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Vinyl n-heterocyclic amines and polymers thereof
Assignee: Dow Chemical Co
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Filing: 1963-02-04
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Granted: 1966-06-14
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Expires: 1983-02-04
Abstract
No abstract record available.
Inventors
- 👤 Lee Lieng-Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:00
CPC Classifications
C; C07; C07D; C07D291/00; C07D291/02; C07D291/04; C07D203/00; C07D203/04; C07D203/06; C07D203/16; C07D203/20; C07D207/00; C07D207/02; C07D207/30; C07D207/32; C07D207/325; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/86; C07D257/00; C07D257/02; C07D257/04; C07D295/00; C07D295/16; C07D295/20; C07D295/205; C07D473/00; C08; C08F; C08F18/00; C08F18/22; C11; C11B; C11B9/00; C11B9/0069; C11B9/0092
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A COMPOUND HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
6 words
A COMPOUND HAVING THE GENERAL FORMULA
Claim 3
Dependent Claim
10 words
A POLYMER OF A MONOMERIC MATERIAL HAVING THE GENERAL FORMULA
Claim 4
Dependent Claim
10 words
A POLYMER OF A MONOMERIC MATERIAL HAVING THE GENERAL FORMULA
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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |