Patent US3272646A successfully refreshed from Google Patents.
Patent US3518206A successfully refreshed from Google Patents.
US3518206A
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Supported catalysts composed of substrate coated with colloidal silica and catalyst
Assignee: EIDP Inc
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Filing: 1968-05-17
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Granted: 1970-06-30
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Expires: 1988-05-17
Abstract
No abstract record available.
Inventors
- 👤 Donald Maurice Sowards
- 👤 Alvin B Stiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:27
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/024; B01J21/00; B01J21/18; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/847; B01J23/8472; B01J29/00; B01J35/00; B01J35/30; B01J35/391; B01J35/395; B01J37/0215; B01J37/0225; B01J2235/00; B01J35/34; B01J35/70; B01J35/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1867435A
Cited
US2580806A
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US2921035A
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US3125539A
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US3155627A
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US3252917A
Cited
US3294576A
Cited
US3329627A
Cited
US3284369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |