Patent US1672176A successfully refreshed from Google Patents.
US1672176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spacer or chair bar for concrete-reenforcing bars
Assignee: Individual
•
Filing: 1925-05-15
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Granted: 1928-06-05
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Expires: 1945-05-15
Abstract
No abstract record available.
Inventors
- 👤 Clark P Schumacher
- 👤 Leon B Schumacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:15
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/16; E04C5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-06-05 | 1931-12-05 | 1932-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-06-05 | 1935-12-05 | 1936-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-06-05 | 1939-12-05 | 1940-06-05 | $7700.00 | Window Closed / Lapsed |