US3172603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchoring device
Assignee: Star Expansion Industries Corp
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Filing: 1960-11-16
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Granted: 1965-03-09
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Expires: 1980-11-16
Abstract
No abstract record available.
Inventors
- 👤 Bell Walter
- 👤 William A Eager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:11
CPC Classifications
F; F16; F16B; F16B13/00; F16B13/12; F16B13/124; E; E01; E01B; E01B9/00; E01B9/02; E01B9/04; E01B9/14; F16B2013/007
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
AN IMPROVED ANCHOR BOLT COMPRISING IN COMBINATION, A BOLT, A PAIR OF MUTUALLY UNSECURED EXPANSION SHIELDS ENGAGEABLE WITH SAID BOLT AND DEFLECTABLE UPON SAID ENGAGEMENT TO CONTACT THE SIDES OF A BORE PROVIDED IN A PRE-STRESSED CONCRETE CROSSTIE, THE SAID EXPANSION SHIELDS BEING CHARACTERIZED BY PLANAR FACES ADAPTED TO BE DISPOSED TRANSVERSELY OF THE SAID PRE-STRESSED CONCRETE CROSSITE WHEREBY THE SAID PLANAR FACES EXERT UPON THE SIDES OF SAID BORE A COMPRESSIVE STRESS PARALLEL TO THE DIRECTION OF PRE-STRESS IN THE SAID CONCRETE CROSSITE, SAID SHIELDS HAVING IDENTICAL THREADS FOR THREADED ENGAGEMENT WITH SAID BOLT.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |