US2430261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of chromium compounds
Assignee: Individual
•
Filing: 1942-01-26
•
Granted: 1947-11-04
•
Expires: 1962-01-26
Abstract
No abstract record available.
Inventors
- 👤 Marvin J Udy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:24
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/30; C22B34/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1526325A
Cited
US1955326A
Cited
US1924710A
Cited
US1975338A
Cited
US2098176A
Cited
US2199929A
Cited
US2229495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-03 | 1951-05-05 | 1951-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-03 | 1955-05-05 | 1955-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-03 | 1959-05-05 | 1959-11-04 | $7700.00 | Window Closed / Lapsed |