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Patent US1251201A successfully refreshed from Google Patents.
US1251201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of catalysts for hydrogenation.
Assignee: Individual
•
Filing: 1916-12-08
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Granted: 1917-12-25
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Expires: 1936-12-08
Abstract
No abstract record available.
Inventors
- 👤 Carleton Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:27
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; Y; Y10; Y10S; Y10S516/00; Y10S516/924
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) | 1920-12-24 | 1921-06-25 | 1921-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-12-24 | 1925-06-25 | 1925-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-12-24 | 1929-06-25 | 1929-12-25 | $7700.00 | Window Closed / Lapsed |