US3116348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas treating device
Assignee: Research Cottrell Inc
•
Filing: 1960-07-27
•
Granted: 1963-12-31
•
Expires: 1980-07-27
Abstract
No abstract record available.
Inventors
- 👤 Alan B Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:49
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/313; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 0
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US2964304A
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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) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |