Patent US3632973A successfully refreshed from Google Patents.
Patent US3393551A successfully refreshed from Google Patents.
US3393551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas chromatograph valve
Assignee: 3M Co
•
Filing: 1964-08-17
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Granted: 1968-07-23
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Expires: 1984-08-17
Abstract
No abstract record available.
Inventors
- 👤 Jerry W Todd
- 👤 Calice G Courneya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:13
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/20; G01N2030/201; G01N2030/202; G01N2030/204; G01N30/26; G01N30/38; G01N2030/382; G01N2030/385; G01N30/40; G01N30/62; G01N30/64; G01N30/66
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) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |