US2427604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction of hollow articles in reinforced concrete
Assignee: Individual
•
Filing: 1943-07-12
•
Granted: 1947-09-16
•
Expires: 1963-07-12
Abstract
No abstract record available.
Inventors
- 👤 Holter Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:17
CPC Classifications
B; B63; B63B; B63B3/00; B63B3/02; B63B3/04; B63B5/00; B63B5/14; B63B5/16; B63B2231/00; B63B2231/60; B63B2231/64; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49828; Y10T29/49829
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) | 1950-09-15 | 1951-03-17 | 1951-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-15 | 1955-03-17 | 1955-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-15 | 1959-03-17 | 1959-09-16 | $7700.00 | Window Closed / Lapsed |