US2358711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing pump assemblies
Assignee: CALUMET AND HECLA CONS COPPER
•
Filing: 1941-11-10
•
Granted: 1944-09-19
•
Expires: 1961-11-10
Abstract
No abstract record available.
Inventors
- 👤 Walter P Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:13
CPC Classifications
B; B21; B21D; B21D41/00; B21D41/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49236
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1947-09-19 | 1948-03-20 | 1948-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-09-19 | 1952-03-20 | 1952-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-09-19 | 1956-03-20 | 1956-09-19 | $7700.00 | Window Closed / Lapsed |