US3475499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of glycols and glycol ethers
Assignee: Atlantic Richfield Co
•
Filing: 1967-03-23
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Granted: 1969-10-28
•
Expires: 1987-03-23
Abstract
No abstract record available.
Inventors
- 👤 Charles N Winnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:13
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/19; C07C; C07C29/00; C07C29/09; C07C29/10; C07C29/103; C07C29/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2786854A
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GB736991A
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US2833787A
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US3030426A
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US3062841A
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US3119848A
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US3351635A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |