Patent US3049174A successfully refreshed from Google Patents.
US3049174A
Expired / Lapsed
US
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Spray drying apparatus
Assignee: Proctor and Schwartz Inc
•
Filing: 1958-02-10
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Granted: 1962-08-14
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Expires: 1978-02-10
Abstract
No abstract record available.
Inventors
- 👤 Jr William R Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:31
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B01; B01D; B01D1/00; B01D1/16; B01D1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1757573A
Cited
US1717115A
Cited
US2384998A
Cited
US2561393A
Cited
US2561395A
Cited
US2730170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |