US2984988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas analysis and control
Assignee: Phillips Petroleum Co
•
Filing: 1956-03-05
•
Granted: 1961-05-23
•
Expires: 1976-03-05
Abstract
No abstract record available.
Inventors
- 👤 Donald E Berger
- 👤 Clyde W Mertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:26
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/3504; Y; Y10; Y10T; Y10T436/00; Y10T436/12; Y10T436/21; Y10T436/214
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2636904A
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US2703844A
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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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |