Patent US3667720A successfully refreshed from Google Patents.
US3667720A
Expired / Lapsed
US
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Tie rod configuration for sealing the threaded inner end of a shebolt
Assignee: WILLIAMS FORM ENGINEERING Corp A MI CORP
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Filing: 1969-09-22
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Granted: 1972-06-06
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Expires: 1989-09-22
Abstract
Abstract THE INTERIOR THREADING ON THE INNER END OF A SHEDBOLT INSTALLED IN A WALL-FORM TIE SYSTEM IS SEALED AGAINST THE INGRESS OF CONCRETE BY THE PRESENCE OF AN ANNULAR RING ADJACENT THE INNER EXTREMITY OF THE THREADING THE ENDS OF THE INNER TIE ROD. THE SEALING RING IS DEFORMABLE, AND OPERATES PREFERABLY IN CONJUNCTION WITH A POSITIVE STOP ARRANGEMENT ENGAGEABLE WITH THE END OF THE TIE ROD.
Inventors
- 👤 Chester I Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:50
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/06; E04G17/065; E04G17/0655; E04G17/0658; E04G17/07; E04G17/0728; E04G17/0742; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17291; Y10T279/17299
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |