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US2472447A
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Lead-titanium-borate glass
Assignee: Eastman Kodak Co
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Filing: 1946-01-29
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Granted: 1949-06-07
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Expires: 1966-01-29
Abstract
No abstract record available.
Inventors
- 👤 Sun Kuan-Han
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:17
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/14; C03C3/142; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE325673C
Cited
US1943051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |