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Patent US2968855A successfully refreshed from Google Patents.
US2968855A
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US
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Removable inserts for pipe passages in concrete
Assignee: Individual
•
Filing: 1958-03-24
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Granted: 1961-01-24
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Expires: 1978-03-24
Abstract
No abstract record available.
Inventors
- 👤 William J Stolz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:17
CPC Classifications
E; E04; E04G; E04G15/00; E04G15/06; E04G15/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US427914A
Cited
US1396280A
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US1391988A
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US2138015A
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US2234784A
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US2311358A
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US2527874A
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US2720017A
Cited
US2721369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |