Patent US2416756A successfully refreshed from Google Patents.
US2416756A
Expired / Lapsed
US
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Continuous production of esters of methacrylic acid
Assignee: EIDP Inc
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Filing: 1941-10-23
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Granted: 1947-03-04
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Expires: 1961-10-23
Abstract
No abstract record available.
Inventors
- 👤 Lawrence T Jilk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:51
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/18; C07C67/22
Claims Analysis
Total Claims: 0
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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) | 1950-03-03 | 1950-09-02 | 1951-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-03 | 1954-09-02 | 1955-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-03 | 1958-09-02 | 1959-03-04 | $7700.00 | Window Closed / Lapsed |