Patent US310049A successfully refreshed from Google Patents.
Patent US2189529A successfully refreshed from Google Patents.
US2189529A
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US
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Unsaturated ether products and process of producing same
Assignee: EIDP Inc
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Filing: 1935-07-12
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Granted: 1940-02-06
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Expires: 1955-07-12
Abstract
No abstract record available.
Inventors
- 👤 Wallace H Carothers
- 👤 Harry B Dykstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:55
CPC Classifications
C; C09; C09D; C09D101/00; C09D101/08; C09D101/16; C09D101/18; C07; C07C; C07C41/00; C07C41/01; C07C41/05; C07C41/06; C07C41/14; C07C41/18; C07C41/28; C07C41/48; C07C41/50; C07C41/54; C07C41/56; C07C43/00; C07C43/02; C07C43/03; C07C43/14; C07C43/15; C07C43/20; C07C43/215
Claims Analysis
Total Claims: 0
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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) | 1943-02-05 | 1943-08-07 | 1944-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-02-05 | 1947-08-07 | 1948-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-02-05 | 1951-08-07 | 1952-02-06 | $7700.00 | Window Closed / Lapsed |