US3398787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion and contraction means for a heat exchanger
Assignee: Struthers Wells Corp
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Filing: 1966-10-11
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Granted: 1968-08-27
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Expires: 1986-10-11
Abstract
No abstract record available.
Inventors
- 👤 Bevevino James William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:15
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0236; F28F9/0239; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/053; Y10S165/054; Y10S165/055; Y10S165/056
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |