US3147082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous sample preparation for chemical analysis
Assignee: Calgon Corp
•
Filing: 1961-06-05
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Granted: 1964-09-01
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Expires: 1981-06-05
Abstract
No abstract record available.
Inventors
- 👤 Ralph N Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:18
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/173845; Y10T436/175383; Y10T436/19; Y10T436/193333; Y10T436/20; Y10T436/203332
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |