Patent US4502974A successfully refreshed from Google Patents.
Patent US2681328A successfully refreshed from Google Patents.
US2681328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile polymers stabilized with certain beta-hydroxy tertiary amines
Assignee: Dow Chemical Co
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Filing: 1952-09-04
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Granted: 1954-06-15
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Expires: 1972-09-04
Abstract
No abstract record available.
Inventors
- 👤 George W Stanton
- 👤 Forrest A Ehlers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:23
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A COMPOSITION OF MATTER THE ESSENTIAL CONSTITUENTS OF WHICH ARE A POLYMERIC BODY CONTAINING AT LEAST 60 PER CENT BY WEIGHT OF ACRYLONTRILE IN THE POLYMER MOLECULE AND, AS A STABLIZING AGENT THEREFOR, FROM 1 TO 20 PER CENT, BASED ON THE WEIGHT OF POLYMER, OF A COMPOUND FROM THE GROUP CONSISTING OF DIMETHYLAMINOETHANOL, 2-(2DIMETHYLAMINOETHOXY) ETHANOL, 1 - DIMETHYLAMINO- 2 - PROPANOL, 3 - DIMETHYLAMINO -1,2PROPANDIOL AND 1,3-BIS(DIMETHYLAMINO) -2-PROPANOL.
Claim 2
Dependent Claim
69 words
A COMPOSITION OF MATTER THE ESSENTIAL CONSTITUENTS OF WHICH ARE A POLYMERIC BODY CONTAINING AT LEAST 60 PER CENT BY WEIGHT OF ACRYLONTRILE IN THE POLYMER MOLECULE AND, AS A STABLIZING AGENT THEREFOR, FROM 1 TO 20 PER CENT, BASED ON THE WEIGHT OF POLYMER, OF A COMPOUND FROM THE GROUP CONSISTING OF DIMETHYLAMINOETHANOL, 2-(2DIMETHYLAMINOETHOXY) ETHANOL, 1 - DIMETHYLAMINO- 2 - PROPANOL, 3 - DIMETHYLAMINO -1,2PROPANDIOL AND 1,3-BIS(DIMETHYLAMINO) -2-PROPANOL.
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) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |