US2481497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing fused ceramic riprap
Assignee: Individual
•
Filing: 1948-09-15
•
Granted: 1949-09-13
•
Expires: 1968-09-15
Abstract
No abstract record available.
Inventors
- 👤 Dow A Buzzell
- 👤 Blackstone George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:46
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/04; E02B3/12; C; C04; C04B; C04B33/00; C04B33/02; Y; Y10; Y10S; Y10S264/00; Y10S264/78
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) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |