US2439129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building column
Assignee: DONAHUE
•
Filing: 1945-04-18
•
Granted: 1948-04-06
•
Expires: 1965-04-18
Abstract
No abstract record available.
Inventors
- 👤 Donahue John Stanley
- 👤 George E Strehan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:52
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/185; Y; Y10; Y10T; Y10T403/00; Y10T403/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |