US2756584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
School building
Assignee: Individual
•
Filing: 1952-08-02
•
Granted: 1956-07-31
•
Expires: 1972-08-02
Abstract
No abstract record available.
Inventors
- 👤 Shelton Thayer Ewing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:08
CPC Classifications
E; E04; E04H; E04H3/00; E04H3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US94116A
Cited
US267159A
Cited
US358083A
Cited
US700794A
Cited
US1048938A
Cited
US1425114A
Cited
US2101538A
Cited
GB496592A
Cited
US2322591A
Cited
US2566099A
Cited
US2510958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |