US3274245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of acrylamide from its salt by vaporization with an inert gas
Assignee: Wyeth Holdings LLC
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Filing: 1963-07-09
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Granted: 1966-09-20
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Expires: 1983-07-09
Abstract
No abstract record available.
Inventors
- 👤 Bobsein William Patrick
- 👤 Jr Joseph Fidelis Mellor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:21
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/02; C07C233/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR ISOLATING ACRYLAMIDE FROM A NEUTRALIZATION MIXTURE RESULTING FROM THE NEUTRALIZATION OF ACRYLAMIDE SULFATE WITH A BASE COMPRISING VAPORIZING THE ACRYLAMIDE BY CONTACTING SAID MIXTURE WITH AN INERT GAS HAVING A TEMPERATURE IN EXCESS OF 20*C., AND SUBSEQUENTLY RECOVERING ACRYLAMIDE FROM SAID GAS-CONTAINING ACRYLAMIE.
Claim 2
Dependent Claim
46 words
A PROCESS FOR ISOLATING ACRYLAMIDE FROM A NEUTRALIZATION MIXTURE RESULTING FROM THE NEUTRALIZATION OF ACRYLAMIDE SULFATE WITH A BASE COMPRISING VAPORIZING THE ACRYLAMIDE BY CONTACTING SAID MIXTURE WITH AN INERT GAS HAVING A TEMPERATURE IN EXCESS OF 20*C., AND SUBSEQUENTLY RECOVERING ACRYLAMIDE FROM SAID GAS-CONTAINING ACRYLAMIE.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |