US1975818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating for pistons
Assignee: Alcoa Corp
•
Filing: 1932-08-24
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Granted: 1934-10-09
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Expires: 1952-08-24
Abstract
No abstract record available.
Inventors
- 👤 Harold K Work
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:35
CPC Classifications
C; C25; C25D; C25D7/00; C25D7/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/49256; Y10T29/49263; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12708; Y10T428/12722; Y10T428/12736; Y10T428/1275
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) | 1937-10-08 | 1938-04-09 | 1938-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-10-08 | 1942-04-09 | 1942-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-10-08 | 1946-04-09 | 1946-10-09 | $7700.00 | Window Closed / Lapsed |