US1935332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer device
Assignee: Bundy Tubing Co
•
Filing: 1932-09-13
•
Granted: 1933-11-14
•
Expires: 1952-09-13
Abstract
No abstract record available.
Inventors
- 👤 Bert L Quarnstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:09
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/24; F28F1/26; F28F1/28; F28F9/00; F28F9/22; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/461; Y10S165/462; Y10S165/463
Claims Analysis
Total Claims: 0
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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) | 1936-11-13 | 1937-05-15 | 1937-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-11-13 | 1941-05-15 | 1941-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-11-13 | 1945-05-15 | 1945-11-14 | $7700.00 | Window Closed / Lapsed |