US3477018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method to measure and control the catalytic activity of metallic catalyst systems
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1966-12-02
•
Granted: 1969-11-04
•
Expires: 1986-12-02
Abstract
No abstract record available.
Inventors
- 👤 James T Richardson
- 👤 Stanford S Toups
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:10
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2779917A
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US2765330A
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US2844781A
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US2819447A
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US2958037A
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US3017256A
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US3151292A
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US3234461A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |