US3488677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for purification of natural gas
Assignee: Tioga Wells Corp
•
Filing: 1967-12-27
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Granted: 1970-01-06
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Expires: 1987-12-27
Abstract
No abstract record available.
Inventors
- 👤 Richard R Tracy
- 👤 Reginald G Spear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:02
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/06; F25J3/063; F25J3/066; B; B01; B01D; B01D53/00; B01D53/002; C; C07; C07C; C07C7/00; C07C7/005; F25J3/0605; F25J3/061; F25J3/0635; F25J2280/00; F25J2280/02; Y; Y02; Y02C; Y02C20/00; Y02C20/20; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/903; Y10S62/927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1272059A
Cited
US2557171A
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US2716332A
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US2973834A
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US3205669A
Cited
US3255596A
Cited
US3158610A
Cited
US3282059A
Cited
US3292381A
Cited
US3360946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |