US3495417A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall construction
Assignee: United States Steel Corp
•
Filing: 1968-06-14
•
Granted: 1970-02-17
•
Expires: 1988-06-14
Abstract
No abstract record available.
Inventors
- 👤 George D Ratliff Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:27
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/74; E04B2/7407; E04B2/7409; E04B1/00; E04B1/62; E04B1/92; E04B1/94; E04B1/941; E04B1/942
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US275000A
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US533856A
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US593804A
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CA685565A
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US965595A
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US1475409A
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US1603895A
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US2172358A
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US3050134A
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US3174387A
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US3305981A
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US3298725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |