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US3499043A
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Recovery of the monoalkyl ethers of poly(oxyethylene) glycols from solutions of tarry acetylenic polymers in said ethers
Assignee: EIDP Inc
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Filing: 1969-01-02
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Granted: 1970-03-03
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Expires: 1989-01-02
Abstract
No abstract record available.
Inventors
- 👤 Eugene Marvin Kling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:28
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/10; C07C43/11; C07C11/00; C07C11/28; C07C2/00; C07C2/02; C07C2/04; C07C2/38; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2914587A
Cited
US2857435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |