Patent US2364590A successfully refreshed from Google Patents.
US2364590A
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Assignee: Cerestar USA Inc
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Filing: 1942-04-08
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Granted: 1944-12-05
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Expires: 1962-04-08
Abstract
No abstract record available.
Inventors
- 👤 Herman H Schopmeyer
- 👤 Herbert A Kaufmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:06
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-12-05 | 1948-06-05 | 1948-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-12-05 | 1952-06-05 | 1952-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-12-05 | 1956-06-05 | 1956-12-05 | $7700.00 | Window Closed / Lapsed |