US1785513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent inhibitor for the acid treatment of metals
Assignee: EIDP Inc
•
Filing: 1929-04-17
•
Granted: 1930-12-16
•
Expires: 1949-04-17
Abstract
No abstract record available.
Inventors
- 👤 William S Calcott
- 👤 Ira E Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:03
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/065
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) | 1933-12-15 | 1934-06-16 | 1934-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-12-15 | 1938-06-16 | 1938-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-12-15 | 1942-06-16 | 1942-12-16 | $7700.00 | Window Closed / Lapsed |