US2426020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coloring garnet
Assignee: Individual
•
Filing: 1945-01-13
•
Granted: 1947-08-19
•
Expires: 1965-01-13
Abstract
No abstract record available.
Inventors
- 👤 Frederick P Hauck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:15
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/1409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US290368A
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US483143A
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US1560659A
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US1782648A
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US1883614A
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US1951555A
Cited
US2006162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-18 | 1951-02-17 | 1951-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-18 | 1955-02-17 | 1955-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-18 | 1959-02-17 | 1959-08-19 | $7700.00 | Window Closed / Lapsed |