US2580388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bib structure
Assignee: Individual
•
Filing: 1948-02-04
•
Granted: 1952-01-01
•
Expires: 1968-02-04
Abstract
No abstract record available.
Inventors
- 👤 Adda M Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:24
CPC Classifications
A; A41; A41B; A41B13/00; A41B13/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2174694A
Cited
US707183A
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US860257A
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US1135564A
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US1618208A
Cited
FR595013A
Cited
US1579629A
Cited
US1940596A
Cited
US2135236A
Cited
US2145524A
Cited
US2425961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |