Patent US2848929A successfully refreshed from Google Patents.
US2848929A
Expired / Lapsed
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Concrete slab key-joint forming member
Assignee: RICHARD N TONE
•
Filing: 1957-01-11
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Granted: 1958-08-26
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Expires: 1977-01-11
Abstract
No abstract record available.
Inventors
- 👤 Warren D Wilbur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:38
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)
US271582A
Cited
US1591509A
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US1607690A
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US1769828A
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US1804215A
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US1741585A
Cited
US2027516A
Cited
US1963088A
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US2023472A
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US1939007A
Cited
US2374623A
Cited
US2630892A
Cited
US2779280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |