US2209585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid resisting enamel
Assignee: Evonik Operations GmbH
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Filing: 1938-08-18
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Granted: 1940-07-30
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Expires: 1958-08-18
Abstract
No abstract record available.
Inventors
- 👤 Stuckert Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:23
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/02; C03C8/04; C03C4/00
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) | 1943-07-30 | 1944-01-29 | 1944-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-07-30 | 1948-01-29 | 1948-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-07-30 | 1952-01-29 | 1952-07-30 | $7700.00 | Window Closed / Lapsed |