Patent US2620573A successfully refreshed from Google Patents.
US2620573A
Expired / Lapsed
US
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Low-pressure product drying
Assignee: Arthur D Little Inc
•
Filing: 1948-01-28
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Granted: 1952-12-09
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Expires: 1968-01-28
Abstract
No abstract record available.
Inventors
- 👤 Howard O Mcmahon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:13
CPC Classifications
F; F26; F26B; F26B5/00; F26B5/04; F26B5/06; Y; Y10; Y10S; Y10S159/00; Y10S159/05; Y10S159/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1200116A
Cited
US2100151A
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US2087788A
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US2411152A
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FR883178A
Cited
US2528476A
Cited
US2396561A
Cited
US2400748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |