Patent US4829270A successfully refreshed from Google Patents.
US2448883A
Expired / Lapsed
US
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Concrete post form
Assignee: Individual
•
Filing: 1944-09-20
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Granted: 1948-09-07
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Expires: 1964-09-20
Abstract
No abstract record available.
Inventors
- 👤 Robert L Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:38
CPC Classifications
E; E04; E04H; E04H17/00; E04H17/26; E04G; E04G13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US394650A
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US714683A
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US775095A
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US964470A
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US1130507A
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US1649909A
Cited
US1597164A
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US1581850A
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US2027765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |