US3546172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene urea terminated phenolic resins
Assignee: Unilever Bestfoods North America
•
Filing: 1968-04-18
•
Granted: 1970-12-08
•
Expires: 1988-04-18
Abstract
No abstract record available.
Inventors
- 👤 Calvin Keith Johnson
- 👤 David Ray Armbruster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:19
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/34; C08G; C08G14/00; C08G14/02; C08G14/04; C08G14/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1892848A
Cited
US3058849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |