Patent US3420910A successfully refreshed from Google Patents.
US3420910A
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Copper sweetening pretreating before isomerizing alpha-pinene
Assignee: SCM Corp
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Filing: 1967-01-16
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Granted: 1969-01-07
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Expires: 1987-01-16
Abstract
No abstract record available.
Inventors
- 👤 Carl Bordenca
- 👤 John Mentzer Derfer
- 👤 Clayton B Hamby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:04
CPC Classifications
C; C07; C07C; C07C13/00; C07C13/28; C07C13/32; C07C13/39; C07C13/42; C07C5/00; C07C5/22; C07C5/23; C07C5/25; C07C5/2506; C07C7/00; C07C7/148; C07C7/14833; C07C7/14841; C07C7/1485; C07C2602/00; C07C2602/36; C07C2602/42
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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |