US3418338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water extractive distillation of an ethylene oxide stream containing formaldehyde
Assignee: Halcon Research and Development Corp
•
Filing: 1966-02-28
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Granted: 1968-12-24
•
Expires: 1986-02-28
Abstract
No abstract record available.
Inventors
- 👤 Gilman Harold
- 👤 Heights Jackson
- 👤 Theodore W Stein
- 👤 George W Whitten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:53
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3174262A
Cited
US3213113A
Cited
US2615901A
Cited
US2622060A
Cited
US2775510A
Cited
US3165539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |