US2464738A
Expired / Lapsed
US
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Method of making optical elements
Assignee: Applied Biosystems Inc
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Filing: 1947-07-08
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Granted: 1949-03-15
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Expires: 1967-07-08
Abstract
No abstract record available.
Inventors
- 👤 John U White
- 👤 Walter A Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:01
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/3602; C03C17/3642; C03C17/3411; C03C17/3417; C03C17/3429; C03C17/3447; C03C17/3452; Y; Y10; Y10S; Y10S264/00; Y10S264/78; Y10S359/00; Y10S359/90; Y10S425/00; Y10S425/808
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) | 1952-03-14 | 1952-09-13 | 1953-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-14 | 1956-09-13 | 1957-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-14 | 1960-09-13 | 1961-03-15 | $7700.00 | Window Closed / Lapsed |