US3438434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subdivided heat exchanger tube bundle assembly providing longitudinally distributed fluid bypass and distributing channels
Assignee: Ametek Inc
•
Filing: 1967-10-19
•
Granted: 1969-04-15
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Expires: 1987-10-19
Abstract
No abstract record available.
Inventors
- 👤 Robert Dilman Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:58
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/06; F28F21/062; F28D; F28D7/00; F28D7/16; F28F13/00; F28F13/06; F28F13/12; F28F13/125; F28F9/00; F28F9/22; F28F9/24; F28F2009/222; F28F2009/228; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/427; Y10S165/435
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3363680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |