Patent US3228973A successfully refreshed from Google Patents.
US3228973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of removing polyacrylates from corresponding monoacrylates with amorphous carbon absorbents
Assignee: Celanese Corp
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Filing: 1961-02-07
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Granted: 1966-01-11
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Expires: 1981-02-07
Abstract
No abstract record available.
Inventors
- 👤 O'connor Patrick Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:02
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/06; C07; C07C; C07C67/00; C07C67/48; C07C67/56; C08J2333/00; C08J2333/04; C08J2333/06; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A PROCESS FOR PURIFYING ACRYLATE MONOMERS BY SEPARATING ACRYLATE POLYMERS FROM A COMPOSITION COMPRISING ACRYLATE MONOMERS AND ACRYLATE POLYMERS WHICH PROCESS COMPRISES CONTACTING SAID COMPOSITION WITH AMORPHOUS CARBON.
Claim 2
Dependent Claim
28 words
A PROCESS FOR PURIFYING ACRYLATE MONOMERS BY SEPARATING ACRYLATE POLYMERS FROM A COMPOSITION COMPRISING ACRYLATE MONOMERS AND ACRYLATE POLYMERS WHICH PROCESS COMPRISES CONTACTING SAID COMPOSITION WITH AMORPHOUS CARBON.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |