Patent US3595669A successfully refreshed from Google Patents.
US3595669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instant coffee product
Assignee: Procter and Gamble Co
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Filing: 1968-11-25
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Granted: 1971-07-27
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Expires: 1988-11-25
Abstract
Abstract CHELATING AGENTS ARE USED AS ANTI-SCUM AND ANTI-FOAM ADDITIVES FOR INSTANT COFFEE. THE CHELATING AGENTS COMPLEX FREE POLYVALENT METAL IONS FOUND IN INSTANT COFFEE DRY COMPONENTS AS WELL AS THE WATER USED FOR RECONSTITUTION AND THEREBY ELIMINATE COFFEE CUP SCUM AND FOAM.
Inventors
- 👤 Rodolf G K Strobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:49
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/24; A23F5/36; A23F5/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |