US3477207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas chromatography apparatus and valves suitable for use therein
Assignee: BP Chemicals Ltd
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Filing: 1967-08-03
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Granted: 1969-11-11
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Expires: 1987-08-03
Abstract
No abstract record available.
Inventors
- 👤 Frank Pawley Auger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:44
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; G01N30/46; G01N30/468; F; F16; F16K; F16K3/00; F16K3/02; F16K3/04; G01N30/04; G01N30/16; G01N30/20; G01N2030/201; G01N2030/202; G01N2030/204; G01N30/40; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86863
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) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |