US3433609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of gases containing methane from hydrocarbons
Assignee: Gas Council
•
Filing: 1964-03-20
•
Granted: 1969-03-18
•
Expires: 1984-03-20
Abstract
No abstract record available.
Inventors
- 👤 George Percival
- 👤 Thomas Alan Yarwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:26
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; B01J8/0446; B01J8/0476; B01J8/048; B01J23/00; B01J23/70; B01J23/76; B01J23/78; B01J8/0005; B01J8/0207; B01J8/0242; B01J8/0257; B01J2208/00; B01J2208/02; B01J2208/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2338346A
Cited
US2634194A
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US2816942A
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GB820257A
Cited
US3186957A
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US3119667A
Cited
US3271325A
Cited
US3132010A
Cited
US3201214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |