US2439489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of silver foil
Assignee: RCA Corp
•
Filing: 1944-06-26
•
Granted: 1948-04-13
•
Expires: 1964-06-26
Abstract
No abstract record available.
Inventors
- 👤 Rosenthal Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:08
CPC Classifications
C; C25; C25D; C25D1/00; C25D1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1056641A
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US1535916A
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US1580198A
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GB261592A
Cited
US1759099A
Cited
US2203283A
Cited
GB432095A
Cited
US2305050A
Cited
US2355933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-13 | 1951-10-13 | 1952-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-13 | 1955-10-13 | 1956-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-13 | 1959-10-13 | 1960-04-13 | $7700.00 | Window Closed / Lapsed |