US2595633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building foundation
Assignee: National Steel Corp
•
Filing: 1946-02-21
•
Granted: 1952-05-06
•
Expires: 1966-02-21
Abstract
No abstract record available.
Inventors
- 👤 Nolan S Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:28
CPC Classifications
E; E02; E02D; E02D27/00; E02D27/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US278224A
Cited
US730374A
Cited
GB191404794A
Cited
US1721198A
Cited
US1741219A
Cited
US2147890A
Cited
GB517278A
Cited
US2387229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |