US3002017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing acrylic acid
Assignee: Goodrich Corp
•
Filing: 1959-07-13
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Granted: 1961-09-26
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Expires: 1979-07-13
Abstract
No abstract record available.
Inventors
- 👤 Norman C Wearsch
- 👤 Paola Anthony J De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:54
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
IN A METHOD OF PREPARING GLACIAL ACRYLIC ACID MONOMER BY DEPOLYMERIZATION AT A TEMPERATURE OF FROM ABOUT 115 TO ABOUT 260*C. OF A HOMOPOLYMER OF BETA-PROPIOLACTONE, THE STEP OF RAPIDLY QUENCHING VAPORS OF ACRYLIC ACID MONOMER BY CONDENSATION WITH SUFFICIENT PRE-COOLED ACRYLIC ACID TO REDUCE THE TEMPERATURE BELOW 70*C.
Claim 2
Dependent Claim
49 words
IN A METHOD OF PREPARING GLACIAL ACRYLIC ACID MONOMER BY DEPOLYMERIZATION AT A TEMPERATURE OF FROM ABOUT 115 TO ABOUT 260*C. OF A HOMOPOLYMER OF BETA-PROPIOLACTONE, THE STEP OF RAPIDLY QUENCHING VAPORS OF ACRYLIC ACID MONOMER BY CONDENSATION WITH SUFFICIENT PRE-COOLED ACRYLIC ACID TO REDUCE THE TEMPERATURE BELOW 70*C.
References Cited (Backward Citations)
US1993886A
Cited
US2361036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |