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US4742142B1
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US4742142B1 - - Google Patents
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1987-04-06
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Granted: 1991-02-26
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Expires: 2007-04-06
Abstract
No abstract record available.
Inventors
- 👤 Shimizu Koji
- 👤 Hamada Mitsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:56
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/16; C08J3/24; C08J3/26; C08J2383/00; C08J2383/04
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) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |