Patent US3378341A successfully refreshed from Google Patents.
US3378341A
Expired / Lapsed
US
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Process for the manufacture of polyphosphates of low bulk density
Assignee: Knapsack AG
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Filing: 1963-10-29
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Granted: 1968-04-16
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Expires: 1983-10-29
Abstract
No abstract record available.
Inventors
- 👤 Hartlapp Gerhard
- 👤 Bielenberg Waldemar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:11
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40; C01B25/41; C01B25/412
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A ONE-STEP SPRAY-DRYING PROCESS FOR THE MANUFACTURE OF POLYPHOSPHATES HAVING A BULK DENSITY OF LESS THAN 0.7 KG./LITER AND DEFINED BY THE GENERAL FORMULA
Claim 2
Dependent Claim
24 words
A ONE-STEP SPRAY-DRYING PROCESS FOR THE MANUFACTURE OF POLYPHOSPHATES HAVING A BULK DENSITY OF LESS THAN 0.7 KG./LITER AND DEFINED BY THE GENERAL FORMULA
References Cited (Backward Citations)
US2419148A
Cited
US2747964A
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US2898189A
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US2986449A
Cited
US3023083A
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US3210154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |