US3399720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate heat exchanger
Assignee: VEB APPARATEBAU MYLAU
•
Filing: 1966-09-30
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Granted: 1968-09-03
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Expires: 1986-09-30
Abstract
No abstract record available.
Inventors
- 👤 Doelz Hans
- 👤 Hipperling Edgar
- 👤 Seidel Joachim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:52
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/001; F28D; F28D7/00; F28D7/10; F28D7/106; F28D9/00; F28D9/0031; F28D9/0037; F28F3/00; F28F3/12; F28F9/26; F28F2250/00; F28F2250/10; F28F2250/104
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) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |