Patent US2594142A successfully refreshed from Google Patents.
US2594142A
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Crystallizing apparatus
Assignee: HENRY H FELDSTEIN
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Filing: 1947-07-15
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Granted: 1952-04-22
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Expires: 1967-07-15
Abstract
No abstract record available.
Inventors
- 👤 Henry H Feldstein
- 👤 Harry R Kilby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:32
CPC Classifications
C; C13; C13B; C13B30/00; C13B30/02; B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/0018; B01D9/0031
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US736875A
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US1156851A
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GB469771A
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US2206237A
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US2097208A
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US2153082A
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US2458440A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |