Patent US3545152A successfully refreshed from Google Patents.
US3545152A
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Concrete insert
Assignee: Illinois Tool Works Inc
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Filing: 1968-07-03
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Granted: 1970-12-08
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Expires: 1988-07-03
Abstract
No abstract record available.
Inventors
- 👤 Friedrich Karl Knohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:51
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/38; E04B1/41; E04B1/4171
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1668842A
Cited
US2410299A
Cited
FR960909A
Cited
GB838452A
Cited
US3221588A
Cited
US3181486A
Cited
US3420032A
Cited
US3401494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |