US2577451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of air foam and air foam fire-extinguishing installations
Assignee: Standard Oil Development Co
•
Filing: 1950-09-23
•
Granted: 1951-12-04
•
Expires: 1970-09-23
Abstract
No abstract record available.
Inventors
- 👤 Clemens Gunter
- 👤 Westenfelder Egidius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:34
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/311; B01F25/3111; B01F25/312; B01F25/3123; B01F25/31232; B01F25/313; B01F25/3132; Y; Y10; Y10S; Y10S261/00; Y10S261/26
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) | 1954-12-03 | 1955-06-04 | 1955-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-03 | 1959-06-04 | 1959-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-03 | 1963-06-04 | 1963-12-04 | $7700.00 | Window Closed / Lapsed |