US2774587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cooling cement clinker
Assignee: Individual
•
Filing: 1952-09-30
•
Granted: 1956-12-18
•
Expires: 1972-09-30
Abstract
No abstract record available.
Inventors
- 👤 Henry D Mayenschein
- 👤 John E Velzy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:48
CPC Classifications
F; F27; F27D; F27D15/00; F27D15/02; F27D15/0206; F27D15/028
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US856770A
Cited
US1210510A
Cited
US1902517A
Cited
US1984315A
Cited
US2174896A
Cited
US2264646A
Cited
US2582547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |