US3427772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for post-tensioning and interconnecting re-enforcing wires using key hole anchor plates in a concrete structure
Assignee: Individual
•
Filing: 1966-09-06
•
Granted: 1969-02-18
•
Expires: 1986-09-06
Abstract
No abstract record available.
Inventors
- 👤 George W Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:28
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08; E04C5/12; E04C5/125; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1796913A
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US2828519A
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US2947118A
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AT216037B
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US3225499A
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US3285569A
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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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |