Patent US2420540A successfully refreshed from Google Patents.
US2420540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cupreous powder and method of making the same
Assignee: Hospitality Homes
•
Filing: 1945-06-29
•
Granted: 1947-05-13
•
Expires: 1965-06-29
Abstract
No abstract record available.
Inventors
- 👤 Dean S Hubbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:19
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B22; B22F; B22F1/00; B22F1/14; B22F1/145; C; C09; C09C; C09C1/00; C09C1/62; C09C1/66; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12181; Y10T428/12493; Y10T428/12535; Y10T428/12583; Y10T428/1259; Y10T428/12986; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |