Patent US2581918A successfully refreshed from Google Patents.
US2581918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foaming apparatus
Assignee: Bridgestone Firestone Inc
•
Filing: 1950-02-03
•
Granted: 1952-01-08
•
Expires: 1970-02-03
Abstract
No abstract record available.
Inventors
- 👤 George A Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:11
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7404; B29B7/7409; B29B7/7414; B01; B01F; B01F27/00; B01F27/27; B01F27/272; B01F27/2721; B01F25/00; B01F2025/91; B01F2025/911; B29K; B29K2021/00; B29K2105/00; B29K2105/0058; B29K2105/0064; 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) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |