US2644516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for spray drying
Assignee: Wyeth Holdings LLC
•
Filing: 1949-07-21
•
Granted: 1953-07-07
•
Expires: 1969-07-21
Abstract
No abstract record available.
Inventors
- 👤 Armin G Brendel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:01
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/16; B01D1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1782822A
Cited
US2396689A
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US2478779A
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US2450599A
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US2473035A
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US2506646A
Cited
US2595852A
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US2566229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |