US2689374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aeration and curing apparatus, particularly for rubber dispersions
Assignee: Commonwealth Engineering Company of Ohio
•
Filing: 1950-05-25
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Granted: 1954-09-21
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Expires: 1970-05-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Toulmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:07
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7404; B29B7/7409; B29B7/7414; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/42; B29B7/7476; B29B7/7495; B29B7/80; B29B7/82; B29B7/826; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C2793/00; B29C2793/009; B29K; B29K2021/00; B29L; B29L2031/00; B29L2031/26; B29L2031/265; Y; Y10; Y10S; Y10S261/00; Y10S261/26
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |