US3469626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate heat exchangers
Assignee: SPX Flow Technology Crawley Ltd
•
Filing: 1968-01-15
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Granted: 1969-09-30
•
Expires: 1988-01-15
Abstract
No abstract record available.
Inventors
- 👤 Felix William Wright
- 👤 Alan Herbert Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:24
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/083; F28F13/00; F28F13/06; F28F13/08; F28F3/02; F28F3/04; F28F3/042; F28F3/046
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |