US2537276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Arthur D Little Inc
•
Filing: 1947-12-22
•
Granted: 1951-01-09
•
Expires: 1967-12-22
Abstract
No abstract record available.
Inventors
- 👤 Howard O Mcmahon
- 👤 Jr Gustave A Bleyle
- 👤 Richard B Hinckley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:37
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/086; F28F2275/00; F28F2275/20; F28F2275/205; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1238574A
Cited
US1631141A
Cited
US1734274A
Cited
US1863586A
Cited
US2096272A
Cited
US2278242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |