Patent US3772231A successfully refreshed from Google Patents.
US3772231A
Expired / Lapsed
US
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Thermosetting resin composition
Assignee: Kureha Corp
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Filing: 1971-10-12
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Granted: 1973-11-13
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Expires: 1991-10-12
Abstract
Abstract A TAR OR PITCH RESIN COMPOSITION COMPRISING AN EPOXIDE RESIN OR A URETHANE RESIN AND A TAR OR A PITCH IS DISCLOSED.
Inventors
- 👤 S Enomoto
- 👤 M Fujioka
- 👤 M Koguro
- 👤 H Wada
- 👤 T Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:38
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/002; C08; C08L; C08L63/00; C08L67/00; C08L75/00; C08L75/04; C08L95/00
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |