US3114221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rod-supporting chair for continuously reinforced concrete paving
Assignee: Superior Concrete Accessories Inc
•
Filing: 1961-05-29
•
Granted: 1963-12-17
•
Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 George J Eriksson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:55
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/16; E04C5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US871210A
Cited
US879148A
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US1127995A
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US1278437A
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US2272761A
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US2409342A
Cited
US2634603A
Cited
DE848696C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-16 | 1967-06-17 | 1967-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-16 | 1971-06-17 | 1971-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-16 | 1975-06-17 | 1975-12-17 | $7700.00 | Window Closed / Lapsed |