US3500028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic chromatography system
Assignee: Foster Grant Co Inc
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Filing: 1965-03-10
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Granted: 1970-03-10
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Expires: 1985-03-10
Abstract
No abstract record available.
Inventors
- 👤 Charles R Killian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:36
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/86; G01N30/8651; B; B65; B65H; B65H67/00; B65H67/04; B65H67/0428; B65H67/0434; G01N30/8603; G06; G06G; G06G7/00; G06G7/48; G06G7/75; B65H2701/00; B65H2701/30; B65H2701/31; G01N30/8606
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) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |