US2930220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchoring structure for building slabs
Assignee: UNITED STATES LIFT SLAB Corp
•
Filing: 1955-05-31
•
Granted: 1960-03-29
•
Expires: 1975-05-31
Abstract
No abstract record available.
Inventors
- 👤 Edward R Hamilton
- 👤 Carl T Fornstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:55
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/185; E04B1/35; E04B1/3511
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US341639A
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US1066436A
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US1032419A
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US2540679A
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US2572928A
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US2715013A
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GB705825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |