US2685839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Akzo Nobel UK PLC
•
Filing: 1950-11-01
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Granted: 1954-08-10
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Expires: 1970-11-01
Abstract
No abstract record available.
Inventors
- 👤 Charles D Vandenburgh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:15
CPC Classifications
F; F04; F04C; F04C14/00; F04C2/00; F04C2/08; F04C2/12; F04C2/14; F04C2/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190627284A
Cited
US1682842A
Cited
US1723493A
Cited
US1726663A
Cited
US1665026A
Cited
US2207493A
Cited
US2423507A
Cited
GB596064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |