Patent US2353165A successfully refreshed from Google Patents.
US2353165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Increasing the apparent surface hardness of enamels
Assignee: Individual
•
Filing: 1940-02-09
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Granted: 1944-07-11
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Expires: 1960-02-09
Abstract
No abstract record available.
Inventors
- 👤 Kreidl Ignaz
- 👤 Kreidl Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:07
CPC Classifications
C; C23; C23D; C23D5/00; C23D13/00
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) | 1947-07-11 | 1948-01-10 | 1948-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-07-11 | 1952-01-10 | 1952-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-07-11 | 1956-01-10 | 1956-07-11 | $7700.00 | Window Closed / Lapsed |