US3424809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective hydrogenation of acetylenic compounds
Assignee: Phillips Petroleum Co
•
Filing: 1966-11-14
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Granted: 1969-01-28
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Expires: 1986-11-14
Abstract
No abstract record available.
Inventors
- 👤 Robert K Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:46
CPC Classifications
C; C10; C10G; C10G69/00; C10G69/02; C10G69/06; C07; C07C; C07C5/00; C07C5/02; C07C5/08; C07C2523/00; C07C2523/70; C07C2523/76; C07C2523/84; C07C2523/85; C07C2523/88; C07C2523/881; C07C2523/882; C10G2400/00; C10G2400/20; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/956
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2511453A
Cited
US2880171A
Cited
US2871182A
Cited
US3167497A
Cited
US3205180A
Cited
US3320155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |