US2449495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Application of phosphate protective coatings to nonferrous metals
Assignee: Westinghouse Electric Corp
•
Filing: 1944-01-12
•
Granted: 1948-09-14
•
Expires: 1964-01-12
Abstract
No abstract record available.
Inventors
- 👤 John C Lum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:53
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/86; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/12; C23C22/13; C23C22/73; C23C22/77
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-14 | 1952-03-15 | 1952-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-14 | 1956-03-15 | 1956-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-14 | 1960-03-15 | 1960-09-14 | $7700.00 | Window Closed / Lapsed |