← Back to Patent Explorer
DE679285C Expired / Lapsed DE ⏱️ 0.0 years remaining

Tubular heat exchanger for liquids with transversely and inwardly directed projections in the wall of the tube

Assignee: Individual
•
Filing: 1936-04-12
•
Granted: 1939-08-02
•
Expires: 1956-04-12
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

No abstract record available.

Inventors

No inventors recorded.

Bibliographic Details

Application Number —
Jurisdiction DE
Data Source google_patents
Last Synchronized 2026-10-28 15:38
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/10; F28D7/106; F28F; F28F1/00; F28F1/10; F28F1/42; F28F1/424; F28F1/426

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag