US3097832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace for expanding perlite and similar substances
Assignee: Individual
•
Filing: 1960-12-21
•
Granted: 1963-07-16
•
Expires: 1980-12-21
Abstract
No abstract record available.
Inventors
- 👤 John B Murdock
- 👤 Herbert A Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:23
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/02; C04B20/04; C04B20/06; C04B20/066
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
A FEEDER FOR FEEDING PERLITE GRANULES INTO A FURNACE, COMPRISING A MULTIPLICITY OF ESSENTIALLY VERTICAL DUCTS, MEANS FOR CONSTANTLY FILLING THE UPPER ENDS OF SAID DUCTS WITH PERLITE GRANULES, A ROTATING DISC LOCATED BELOW THE BOTTOM OF THE SAID DUCTS, A BURNER, A CENTRAL HOLE IN SAID ROTATING DISC THROUGH WHICH PASSES THE FLAME AND HOT GASES FROM THE BURNER, AND MEANS FOR MOVING SAID PERLITE GRANULES OFF SAID ROTATING DISC INTO THE FLAME.
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) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |