US3491518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid-gas separating means
Assignee: Ashland LLC
•
Filing: 1966-09-15
•
Granted: 1970-01-27
•
Expires: 1986-09-15
Abstract
No abstract record available.
Inventors
- 👤 David C Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:38
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/487
Claims Analysis
Total Claims: 0
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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) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |