US3525379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry compositions,cores and method of making same
Assignee: Unilever Bestfoods North America
•
Filing: 1968-04-18
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Granted: 1970-08-25
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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
2026-11-01 19:16
CPC Classifications
C; C08; C08L; C08L61/00; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; C08J; C08J3/00; C08J3/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |