Patent US3477990A successfully refreshed from Google Patents.
US3477990A
Expired / Lapsed
US
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Process for reacting a phenol with an epoxy compound and resulting products
Assignee: Shell USA Inc
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Filing: 1967-12-07
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Granted: 1969-11-11
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Expires: 1987-12-07
Abstract
No abstract record available.
Inventors
- 👤 Mark F Dante
- 👤 Harvey L Parry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:40
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08G65/105; C08G65/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2506486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |