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Patent US2571664A successfully refreshed from Google Patents.
US2571664A
Expired / Lapsed
US
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Track door structure
Assignee: Individual
•
Filing: 1945-10-31
•
Granted: 1951-10-16
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Expires: 1965-10-31
Abstract
No abstract record available.
Inventors
- 👤 Blum Chase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:39
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US272392A
Cited
US744552A
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US988265A
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US1012576A
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US1072600A
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GB203186A
Cited
US1732164A
Cited
US1941969A
Cited
US2012925A
Cited
US2206051A
Cited
US2378114A
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 |