Patent US3507809A successfully refreshed from Google Patents.
US3507809A
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Preparation of epoxidation catalyst solution
Assignee: Halcon International Inc
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Filing: 1967-01-03
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Granted: 1970-04-21
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Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 John Kollar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:28
CPC Classifications
B; B01; B01J; B01J37/00; B01J23/00; B01J23/16; B01J23/20; B01J23/22; B01J23/24; B01J23/28; B01J23/30; B01J31/00; B01J31/02; B01J31/0201; B01J31/26; B01J31/34; B01J31/36; B01J2231/00; B01J2231/70; B01J2231/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |