US3669789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making plastic fiber-optical plates
Assignee: Fujifilm Holdings Corp
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Filing: 1970-03-23
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Granted: 1972-06-13
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Expires: 1990-03-23
Abstract
Abstract A METHOD OF MAKING PLASIC FIBER-OPTICAL PLATES BY LAMINATING A NUMBER OF TRANSPARENT PLASTIC SHEETS USING LAYERS OF AN ADHESIVE HAVING A LOW REFRACTIVE INDEX, SLICING THE RESULTING LAMINATED BLOCK TO FORM THIN SHEETS AND LAMINATING THE THIN SHEETS USING LAYERS OF AN ADHESIVE HAVING A LOW REFRACTIVE INDEX IS DISCLOSED.
Inventors
- 👤 Mikio Utsugi
- 👤 Takahiro Ohta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:40
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29; B29D; B29D11/00; B29D11/00663; B32B37/00; B32B37/14; B32B37/16; B32B37/18; B32B37/182; G; G02; G02B; G02B6/00; G02B6/04; G02B6/06; G02B6/08; B32B38/00; B32B2038/0052; B32B2038/0092; B32B2255/00; B32B2255/20; B32B2255/205; B32B2307/00; B32B2307/40; B32B2307/412; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1059; Y10T156/1062; Y10T156/1075
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |