US3430694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate structure for heat exchangers
Assignee: Individual
•
Filing: 1966-11-03
•
Granted: 1969-03-04
•
Expires: 1986-11-03
Abstract
No abstract record available.
Inventors
- 👤 Olof Cardell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:55
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0031; F28D9/0062; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/373; Y10S165/384
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1648511A
Cited
US2267619A
Cited
US2611586A
Cited
US2601973A
Cited
US3255816A
Cited
US3211219A
Cited
US3280906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |