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Patent US3472718A successfully refreshed from Google Patents.
US3472718A
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Methods of making display devices
Assignee: American Optical Corp
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Filing: 1965-12-20
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Granted: 1969-10-14
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Expires: 1985-12-20
Abstract
No abstract record available.
Inventors
- 👤 Walter P Siegmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:06
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J29/892; B; B29; B29C; B29C69/00; B29C69/001; B29C69/002; B29C69/003; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/20; G; G02; G02B; G02B6/00; G02B6/04; G02B6/06
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) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |