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US3488923A
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Solvent extraction of hydrogen halides
Assignee: Phillips Petroleum Co
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Filing: 1968-02-08
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Granted: 1970-01-13
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Expires: 1988-02-08
Abstract
No abstract record available.
Inventors
- 👤 William M Hutchinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:08
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/09; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/68; C01B7/01; C01B7/07; C01B7/0706; C01B7/0731; C01B7/0737; C01B7/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2615925A
Cited
US2697124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |