US2939693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary kiln
Assignee: SOUTHERN LIGHTWEIGHT AGGREGATE
•
Filing: 1956-08-06
•
Granted: 1960-06-07
•
Expires: 1976-08-06
Abstract
No abstract record available.
Inventors
- 👤 Old Albert Floyd
- 👤 Gibson Richard Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:57
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/14; F27B7/16; F27B7/161; F27B7/162
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US977244A
Cited
US1649839A
Cited
US1834963A
Cited
US1793408A
Cited
US2111783A
Cited
US2104040A
Cited
US2430601A
Cited
US2715283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |