Patent US2235259A successfully refreshed from Google Patents.
Patent US3535265A successfully refreshed from Google Patents.
US3535265A
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Chromatographic adsorbents
Assignee: Merck KGaA
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Filing: 1967-01-10
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Granted: 1970-10-20
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Expires: 1987-01-10
Abstract
No abstract record available.
Inventors
- 👤 Karl-Heinz Baron
- 👤 Erich Wieters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:16
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/90; G01N30/92; G01N30/93; B; B01; B01J; B01J20/00; B01J20/02; B01J20/04; B01J20/048; B01J20/06; B01J20/08; B01J20/10; B01J20/103; B01J20/28; B01J20/28014; B01J20/2803; B01J20/281; B01J20/282; B01J20/283; B01J20/284; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3206; B01J20/3208; B01J20/3231; B01J20/3234; B01J20/3236; B01J2220/00; B01J2220/40; B01J2220/49; B01J2220/50; B01J2220/54; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259
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) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |