US2697930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slab supporting frame for reinforced concrete building construction
Assignee: Individual
•
Filing: 1950-03-21
•
Granted: 1954-12-28
•
Expires: 1970-03-21
Abstract
No abstract record available.
Inventors
- 👤 David B Cheskin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:51
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US681304A
Cited
US1009712A
Cited
US1088956A
Cited
US1128912A
Cited
US1973741A
Cited
US2033595A
Cited
US2469455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |