Patent US2765856A successfully refreshed from Google Patents.
US2765856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire extinguishing foam producing unit
Assignee: National Foam System Inc
•
Filing: 1952-11-01
•
Granted: 1956-10-09
•
Expires: 1972-11-01
Abstract
No abstract record available.
Inventors
- 👤 Paul J Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:38
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/311; B01F25/3111; B01F25/31112
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2047716A
Cited
US1120129A
Cited
US1893210A
Cited
GB441441A
Cited
US2183561A
Cited
US2478998A
Cited
US2601899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |