US2469490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared transmitting glass
Assignee: Corning Glass Works
•
Filing: 1944-11-06
•
Granted: 1949-05-10
•
Expires: 1964-11-06
Abstract
No abstract record available.
Inventors
- 👤 William H Armistead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:12
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/02; C03C14/00; C03C14/006; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1271652A
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US2049765A
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GB421142A
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DE640153C
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US2097275A
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FR776979A
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CH181758A
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GB445344A
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FR44536E
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US2099602A
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US1983151A
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DE668593C
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |