US1355477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for separating mixtures
Assignee: United Chemical & Organic Prod
•
Filing: 1918-11-04
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Granted: 1920-10-12
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Expires: 1938-11-04
Abstract
No abstract record available.
Inventors
- 👤 Sylvester S Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:40
CPC Classifications
B; B03; B03C; B03C7/00; B03C7/02; B03C7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1923-10-12 | 1924-04-12 | 1924-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-10-12 | 1928-04-12 | 1928-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-10-12 | 1932-04-12 | 1932-10-12 | $7700.00 | Window Closed / Lapsed |