US2591536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating bucky diaphragm
Assignee: Liebel Flarsheim Co LLC
•
Filing: 1949-01-15
•
Granted: 1952-04-01
•
Expires: 1969-01-15
Abstract
No abstract record available.
Inventors
- 👤 Carl K Gieringer
- 👤 Duckering Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:02
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/02; G21K1/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1768769A
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US1722573A
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US1941989A
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US1945499A
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DE637579C
Cited
US2145868A
Cited
US2147601A
Cited
US2241516A
Cited
US2204347A
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US2441324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |