Patent US3471118A successfully refreshed from Google Patents.
US3471118A
Expired / Lapsed
US
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Apparatus for holding threaded sleeves in the shell form for producing concrete rail ties
Assignee: Walter Bau AG
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Filing: 1967-07-26
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Granted: 1969-10-07
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Expires: 1987-07-26
Abstract
No abstract record available.
Inventors
- 👤 Hermann Bormann
- 👤 Jurgen Von Schell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:24
CPC Classifications
B; B28; B28B; B28B23/00; B28B23/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1907618A
Cited
US2656115A
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US2695754A
Cited
US2924962A
Cited
US3190607A
Cited
US3205634A
Cited
US3190041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |