US2248530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal article having antifriction surface
Assignee: Individual
•
Filing: 1939-06-05
•
Granted: 1941-07-08
•
Expires: 1959-06-05
Abstract
No abstract record available.
Inventors
- 👤 Granger Edson Raymond
- 👤 Cleveland Ralph Ellesworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:41
CPC Classifications
C; C25; C25D; C25D7/00; C25D7/10; Y; Y10; Y10S; Y10S29/00; Y10S29/012; Y10S29/036; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49703; Y10T29/49705; Y10T29/49709
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) | 1944-07-07 | 1945-01-06 | 1945-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-07 | 1949-01-06 | 1949-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-07 | 1953-01-06 | 1953-07-08 | $7700.00 | Window Closed / Lapsed |