US3822928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin film light guide
Assignee: AT&T Inc
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Filing: 1973-05-29
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Granted: 1974-07-09
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Expires: 1993-05-29
Abstract
Abstract Thin film light guide circuit utilizing electromagnetic radiation comprising a defect-free, essentially homogeneous polymeric film produced by in situ polymerization of at least one monomer within a plasma discharge region.
Inventors
- 👤 G Smolinsky
- 👤 P Tien
- 👤 M Vasile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:05
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/13; G02B6/138; C; C08; C08G; C08G85/00; Y; Y10; Y10S; Y10S522/00; Y10S522/915; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
23 words
Circuit in accordance with claim 1 wherein said plasma deposited polymer is an organic material having a boiling point less than 150* C.
Claim 2
Dependent Claim
13 words
Circuit in accordance with claim 2 wherein said polymer is deposited from vinyltrimethylsilane.
Claim 3
Dependent Claim
13 words
Circuit in accordance with claim 2 wherein said polymer is deposited from hexamethyldisiloxane.
Claim 4
Dependent Claim
20 words
Circuit in accordance with claim 1 wherein said plasma deposited polymer comprises multiple layers of polymer having differing refracting indices.
Claim 5
Dependent Claim
18 words
Circuit in accordance with claim 5 wherein said polymer is deposited from a mixture of hexamethyldisiloxane and vinyltrimethylsilane.
Claim 6
Dependent Claim
34 words
Circuit in accordance with claim 1 wherein said plasma deposited polymer comprises a single layer of polymer having a refractive index which decreases parabolically from the middle plane to the top and bottom surfaces.
References Cited (Backward Citations)
US3434774A
Cited
US3694055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |