Patent US2039593A successfully refreshed from Google Patents.
US2039593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer coil
Assignee: Individual
•
Filing: 1935-06-20
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Granted: 1936-05-05
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Expires: 1955-06-20
Abstract
No abstract record available.
Inventors
- 👤 Theodore N Hubbuch
- 👤 William G O'toole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:01
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/03; F28D1/0308; F28F; F28F3/00; F28F3/02; F28F3/04; F28F3/048; F28F3/12; F28D2001/0253; F28D2001/0286; F28D2001/0293; F28F2230/00
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) | 1939-05-05 | 1939-11-04 | 1940-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-05-05 | 1943-11-04 | 1944-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-05-05 | 1947-11-04 | 1948-05-05 | $7700.00 | Window Closed / Lapsed |