US2189348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating and ventilating system
Assignee: Bishop and Babcock Manufacturing Co
•
Filing: 1938-01-06
•
Granted: 1940-02-06
•
Expires: 1958-01-06
Abstract
No abstract record available.
Inventors
- 👤 Mayo Edward Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:57
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00007; B60H1/00021; B60H1/00035; B60H1/00042; B60H1/00207; B60H2001/00214; B60H3/00; B60H3/06; Y; Y10; Y10S; Y10S165/00; Y10S165/228; Y10S165/302; Y10S165/307; Y10S165/308; Y10S165/309
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-02-05 | 1943-08-07 | 1944-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-02-05 | 1947-08-07 | 1948-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-02-05 | 1951-08-07 | 1952-02-06 | $7700.00 | Window Closed / Lapsed |