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Patent US3458976A successfully refreshed from Google Patents.
US3458976A
Expired / Lapsed
US
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Article of manufacture for making chromatographic separations
Assignee: Dow Chemical Co
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Filing: 1967-10-30
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Granted: 1969-08-05
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Expires: 1987-10-30
Abstract
No abstract record available.
Inventors
- 👤 Oscar Leroy Hollis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:53
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/22; B01J20/26; B01J20/264; B01J20/28; B01J20/28002; B01J20/28004; B01J20/28054; B01J20/28057; B01J20/281; B01J20/282; B01J20/285; B01J2220/00; B01J2220/50; B01J2220/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2341175A
Cited
US2537951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |