Patent US2571321A successfully refreshed from Google Patents.
US2571321A
Expired / Lapsed
US
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Auxiliary core
Assignee: Individual
•
Filing: 1945-11-29
•
Granted: 1951-10-16
•
Expires: 1965-11-29
Abstract
No abstract record available.
Inventors
- 👤 Eberhard E Wettley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:59
CPC Classifications
A; A47; A47K; A47K10/00; A47K10/24; A47K10/32; A47K10/34; A47K10/38; A47K10/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US469301A
Cited
US1023587A
Cited
US1559151A
Cited
US1888426A
Cited
US1851722A
Cited
US1825822A
Cited
US1992077A
Cited
US2073429A
Cited
US2181207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-15 | 1955-04-16 | 1955-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-15 | 1959-04-16 | 1959-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-15 | 1963-04-16 | 1963-10-16 | $7700.00 | Window Closed / Lapsed |