Patent US2678224A successfully refreshed from Google Patents.
US3535017A
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Optical fiber waveguide structures
Assignee: AT&T Inc
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Filing: 1968-01-08
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Granted: 1970-10-20
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Expires: 1988-01-08
Abstract
No abstract record available.
Inventors
- 👤 Stewart E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:23
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; C; C03; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/01205; C03B37/01211; C03B37/01217; C03B37/02; C03B37/025; C03B37/027; C03B37/02709; G02B6/04; G02B6/24; G02B6/26; G02B6/28; G02B6/2804; G02B6/36; G02B6/38; G02B6/3807; G02B6/3833; G02B6/3834; G02B6/3841; C03B2203/00; C03B2203/02; C03B2203/10; C03B2203/12; C03B2203/30; C03B2203/36; C03B2205/00; C03B2205/08; C03B2205/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3278283A
Cited
US3350654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |