US2644497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamp used in clamping plastic blocks together in plank construction
Assignee: Individual
•
Filing: 1950-09-25
•
Granted: 1953-07-07
•
Expires: 1970-09-25
Abstract
No abstract record available.
Inventors
- 👤 Emory M Wilmer
- 👤 William P Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:21
CPC Classifications
B; B28; B28B; B28B23/00; B28B23/02; B28B23/22; E; E04; E04C; E04C5/00; E04C5/08; E04C5/12; E04C5/122; Y; Y10; Y10S; Y10S52/00; Y10S52/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US673937A
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US1091260A
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US1413015A
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US1424034A
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US1680923A
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US2102447A
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US2066541A
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US2075633A
Cited
US2172461A
Cited
US2184137A
Cited
US2180866A
Cited
US2395656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |