Patent US2574587A successfully refreshed from Google Patents.
US2574587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot water circulator
Assignee: ELLIOTT M FEINBERG
•
Filing: 1948-02-04
•
Granted: 1951-11-13
•
Expires: 1968-02-04
Abstract
No abstract record available.
Inventors
- 👤 Parnes Morris
- 👤 Gruber Abraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:19
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/0028; Y; Y10; Y10S; Y10S203/00; Y10S203/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1362862A
Cited
GB189322805A
Cited
US867598A
Cited
FR447031A
Cited
FR527995A
Cited
DE459060C
Cited
DE727808C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |