US3227790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for granulation of perborate
Assignee: Evonik Operations GmbH
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Filing: 1964-03-30
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Granted: 1966-01-04
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Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 Bretschneider Gunther
- 👤 Kuzel Peter
- 👤 Pistor Horst
- 👤 Sperr Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
B; B01; B01J; B01J2/00; C; C01; C01B; C01B15/00; C01B15/055; C01B15/12; C01B15/123; C01B15/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR GRANULATING SODIUM PERBORATE WHICH COMPRISES SPRAYING A SUPERDRIED FINELY DIVIDED SODIUM PERBORATE TETRAHYDRATE THE CONTENT OF WATER OF CRYSTALLIZATION OF WHICH HAS BEEN REDUCED BY 0.2 TO 3 MOL. PER MOL. OF NABO3 WITH A QUANITITY OF WATER HAVING A BINDING AGENT DISSOLVED THEREIN SUBSTANTIALLY EQUIVALENT TO THAT REQUIRIED FOR COMPLETE REHYDRATION OF THE SUPERDRIED SODIUM PERBORATE TO THE TETRAHYDRATE STAGE WHILE MAINTAINING RELATIVE MOVEMENT BETWEEN THE FINELY DIVIDED PERBORATE AND THE GRANULES PRODUCED THEREFROM DURING SUCH SPRAYING AND THE ENSUING REHYDRATION.
Claim 2
Dependent Claim
85 words
A PROCESS FOR GRANULATING SODIUM PERBORATE WHICH COMPRISES SPRAYING A SUPERDRIED FINELY DIVIDED SODIUM PERBORATE TETRAHYDRATE THE CONTENT OF WATER OF CRYSTALLIZATION OF WHICH HAS BEEN REDUCED BY 0.2 TO 3 MOL. PER MOL. OF NABO3 WITH A QUANITITY OF WATER HAVING A BINDING AGENT DISSOLVED THEREIN SUBSTANTIALLY EQUIVALENT TO THAT REQUIRIED FOR COMPLETE REHYDRATION OF THE SUPERDRIED SODIUM PERBORATE TO THE TETRAHYDRATE STAGE WHILE MAINTAINING RELATIVE MOVEMENT BETWEEN THE FINELY DIVIDED PERBORATE AND THE GRANULES PRODUCED THEREFROM DURING SUCH SPRAYING AND THE ENSUING REHYDRATION.
References Cited (Backward Citations)
US2592421A
Cited
US2900668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |