Patent US2444896A successfully refreshed from Google Patents.
US2444896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a catalyst of fibrous asbestos
Assignee: Baker and Co Inc
•
Filing: 1943-04-21
•
Granted: 1948-07-06
•
Expires: 1963-04-21
Abstract
No abstract record available.
Inventors
- 👤 Shreir Louis Lionel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:19
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/50; B01J35/58
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US571580A
Cited
US1193798A
Cited
US674774A
Cited
US956832A
Cited
US980158A
Cited
US1698009A
Cited
GB364342A
Cited
GB382472A
Cited
US1966553A
Cited
US2166266A
Cited
US2175715A
Cited
US2197805A
Cited
US2326523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |