US2414734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight concrete aggregate
Assignee: Individual
•
Filing: 1943-09-04
•
Granted: 1947-01-21
•
Expires: 1963-09-04
Abstract
No abstract record available.
Inventors
- 👤 Gelbman Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:21
CPC Classifications
C; C04; C04B; C04B18/00; C04B18/02; C04B18/027; C04B18/04; C04B18/06; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S264/00; Y10S264/49; Y10S425/00; Y10S425/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-01-20 | 1950-07-22 | 1951-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-01-20 | 1954-07-22 | 1955-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-01-20 | 1958-07-22 | 1959-01-21 | $7700.00 | Window Closed / Lapsed |