US1526423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitreous material
Assignee: ARTHUR A NOYES TRUSTEE
•
Filing: 1920-10-13
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Granted: 1925-02-17
•
Expires: 1940-10-13
Abstract
No abstract record available.
Inventors
- 👤 Frederick G Keyes
- 👤 Charles A Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:38
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C27/00; C03C27/02
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) | 1928-02-17 | 1928-08-18 | 1929-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-02-17 | 1932-08-18 | 1933-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-02-17 | 1936-08-18 | 1937-02-17 | $7700.00 | Window Closed / Lapsed |