Patent US3447338A successfully refreshed from Google Patents.
US3447338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cooling particulate solids
Assignee: Hupp Corp
•
Filing: 1967-04-20
•
Granted: 1969-06-03
•
Expires: 1987-04-20
Abstract
No abstract record available.
Inventors
- 👤 Horace L Smith Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:46
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/44; A; A23; A23B; A23B2/00; A23B2/40; A23B2/42; A23B2/425; A23N; A23N12/00; A23N12/08; A23P; A23P30/00; A23P30/30; A23P30/38; B01J8/38; B01J8/384; B01J8/386
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2309036A
Cited
US2766534A
Cited
US2648206A
Cited
US2857683A
Cited
US2893849A
Cited
US2925666A
Cited
US3161483A
Cited
US3169380A
Cited
US3328894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |