US3524633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer apparatus utilizing particles of granular material
Assignee: Individual
•
Filing: 1968-07-24
•
Granted: 1970-08-18
•
Expires: 1988-07-24
Abstract
No abstract record available.
Inventors
- 👤 Benjamin P Shiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:13
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/30; F23G5/08; F23G5/12; F23G7/00; F23G7/06; F23G7/061; F23G7/065; F23G7/066; F23G2201/00; F23G2201/50; F23G2209/00; F23G2209/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |