US2444372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion joint
Assignee: Individual
•
Filing: 1945-07-23
•
Granted: 1948-06-29
•
Expires: 1965-07-23
Abstract
No abstract record available.
Inventors
- 👤 Robert R Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:27
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/02; E01C11/04; E01C11/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1675313A
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US1856722A
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US2256930A
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US2096254A
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US2299670A
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US2086393A
Cited
US2130859A
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US2166220A
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US2246903A
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US2215653A
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US2278023A
Cited
US2325472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |