US3543531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Freeze refining apparatus
Assignee: CLYDE C ADAMS
•
Filing: 1967-05-08
•
Granted: 1970-12-01
•
Expires: 1987-05-08
Abstract
No abstract record available.
Inventors
- 👤 Clyde C Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:52
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/02; C22B21/00; C22B21/06; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1594390A
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US2071465A
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US2549215A
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US2639594A
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US2764880A
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US2995016A
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US3031863A
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US3400548A
Cited
US3287927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |