US3499476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray drying of liquids to form particulate solids
Assignee: Knapsack AG
•
Filing: 1968-04-23
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Granted: 1970-03-10
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Expires: 1988-04-23
Abstract
No abstract record available.
Inventors
- 👤 Gerhard Hartlapp
- 👤 Helmut Klee
- 👤 Josef Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:50
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40; C01B25/41; C01B25/412; C01B25/414; B; B01; B01D; B01D1/00; B01D1/16; B01D1/20; B01J; B01J2/00; B01J2/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1358084A
Cited
US2006757A
Cited
GB755950A
Cited
US2879862A
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US3112239A
Cited
US3212559A
Cited
US3247890A
Cited
US3322181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |