Patent US2587020A successfully refreshed from Google Patents.
US4976510B2
Expired / Lapsed
US
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Communication outlet
Assignee: Corning Research and Development Corp
•
Filing: 1989-11-20
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Granted: 1995-05-09
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Expires: 2009-11-20
Abstract
No abstract record available.
Inventors
- 👤 Dan I Davila
- 👤 John A Midkiff
- 👤 Dulip Ekanayake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:23
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/46; G02B6/47; G02B6/475; G02B6/24; G02B6/36; G02B6/38; G02B6/3807; G02B6/381; G02B6/3825; G02B6/3873; G02B6/3874; G02B6/3878; G02B6/44; G02B6/4439; G02B6/444; G02B6/44528
Claims Analysis
Total Claims: 0
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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) | 1998-05-08 | 1998-11-07 | 1999-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-08 | 2002-11-07 | 2003-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-08 | 2006-11-07 | 2007-05-09 | $7700.00 | Window Closed / Lapsed |