US3396680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal reactors
Assignee: Dorr Oliver Inc
•
Filing: 1967-02-28
•
Granted: 1968-08-13
•
Expires: 1987-02-28
Abstract
No abstract record available.
Inventors
- 👤 Peter J Hubbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:02
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/32; F23G7/00; F23G7/001; F23G2204/00; F23G2204/10; F23G2204/103; F23G2205/00; F23G2205/20
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) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |