Patent US2068801A successfully refreshed from Google Patents.
US2068801A
Expired / Lapsed
US
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Borosilicate glass containing cerium
Assignee: Corning Glass Works
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Filing: 1935-07-30
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Granted: 1937-01-26
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Expires: 1955-07-30
Abstract
No abstract record available.
Inventors
- 👤 Harrison P Hood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:13
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091
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) | 1940-01-26 | 1940-07-27 | 1941-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-01-26 | 1944-07-27 | 1945-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-01-26 | 1948-07-27 | 1949-01-26 | $7700.00 | Window Closed / Lapsed |