Patent US3531305A successfully refreshed from Google Patents.
US3531305A
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US
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Method of making infrared transmitting germanate glasses
Assignee: Corning Glass Works
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Filing: 1967-03-06
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Granted: 1970-09-29
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Expires: 1987-03-06
Abstract
No abstract record available.
Inventors
- 👤 William H Dumbaugh Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:40
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/10; C03C3/00; C03C3/12; C03C3/253; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |