Patent US1986348A successfully refreshed from Google Patents.
Patent US3472031A successfully refreshed from Google Patents.
US3472031A
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US
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Precast concrete body
Assignee: RAI B KELSO
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Filing: 1967-11-06
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Granted: 1969-10-14
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Expires: 1987-11-06
Abstract
No abstract record available.
Inventors
- 👤 Rai B Kelso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:58
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/02; E02D5/03; E02D5/10; E02D5/12; E02D5/22; E02D5/52; E02D5/523
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US283683A
Cited
US919788A
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US1002161A
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US1893003A
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US2184462A
Cited
US2374624A
Cited
US2511761A
Cited
US2686951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |