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US2705228A
Expired / Lapsed
US
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Unsaturated acid esters of hydroxyalkylcarboxyalkylamines and polymers
Assignee: EIDP Inc
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Filing: 1952-05-15
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Granted: 1955-03-29
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Expires: 1972-05-15
Abstract
No abstract record available.
Inventors
- 👤 Hilmer E Winberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:37
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A TERTIARY AMINE HAVING THE TERTIARY AMINO NITROGEN BONDED TO AN ALKYL RADICAL FURTHER SUBSTITUTED BY A RADICAL,
Claim 2
Dependent Claim
18 words
A TERTIARY AMINE HAVING THE TERTIARY AMINO NITROGEN BONDED TO AN ALKYL RADICAL FURTHER SUBSTITUTED BY A RADICAL,
References Cited (Backward Citations)
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US2311548A
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US2409126A
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US2508718A
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US2458422A
Cited
US2601251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-28 | 1958-09-27 | 1959-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-28 | 1962-09-27 | 1963-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-28 | 1966-09-27 | 1967-03-29 | $7700.00 | Window Closed / Lapsed |