Patent US3520965A successfully refreshed from Google Patents.
US3520965A
Expired / Lapsed
US
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Treatment of sodium benzoate
Assignee: Kalama Chemical Inc
•
Filing: 1968-07-09
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Granted: 1970-07-21
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Expires: 1988-07-09
Abstract
No abstract record available.
Inventors
- 👤 August W Dege
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:05
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/70; A23B2/725; A23B2/729; A23B2/742; A23B2/754; C; C07; C07C; C07C63/00; C07C63/04; C07C63/06; C07C63/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2623243A
Cited
US3444287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |