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US3477833A
Expired / Lapsed
US
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Process for the production of a natural gas substitute
Assignee: Laclede Gas Co
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Filing: 1965-01-06
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Granted: 1969-11-11
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Expires: 1985-01-06
Abstract
No abstract record available.
Inventors
- 👤 Edward Vincent Mcmullin
- 👤 John Gerald Hofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:38
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; C; C10; C10G; C10G11/00; C10G11/02; C10G11/10
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) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |