US3429693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction of metals
Assignee: FMC Corp
•
Filing: 1965-12-27
•
Granted: 1969-02-25
•
Expires: 1985-12-27
Abstract
No abstract record available.
Inventors
- 👤 William C Bauer
- 👤 Carl K Amano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:14
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/30; C22B34/36; C22B3/00; C22B3/04; C22B3/06; C22B34/20; C22B34/22; C22B34/34; C22B35/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |