Patent US2214833A successfully refreshed from Google Patents.
Patent US3434401A successfully refreshed from Google Patents.
US3434401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing strips for concrete slabs
Assignee: United States Department of the Interior
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Filing: 1967-06-20
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Granted: 1969-03-25
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Expires: 1987-06-20
Abstract
No abstract record available.
Inventors
- 👤 Jack L Kiewit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:06
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/02; E01C11/04; E01C11/10; E01C11/106; E01C23/00; E01C23/02; E01C23/026; E02; E02B; E02B3/00; E02B3/16; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6812
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1806275A
Cited
US1965403A
Cited
US2245633A
Cited
US2431385A
Cited
US2695513A
Cited
US2937065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |