US2549211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance element for pyrometers
Assignee: ABB Norden Holding AB
•
Filing: 1947-08-21
•
Granted: 1951-04-17
•
Expires: 1967-08-21
Abstract
No abstract record available.
Inventors
- 👤 Lamm Uno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:02
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A RESISTANCE ELEMENT FOR PYROMETERS, COMPRISING A PORCELAIN CORE, A WIRE OF A METAL HAVING A HIGH MELTING POINT AND LOW CHEMICAL AFFINITY WOUND ON SAID CORE, A PORCELAIN TUBE TIGHTLY SURROUNDING SAID CORE AND WIRE, AND A GLAZE HAVING A HIGH POINT OF FUSION FULLING THE SPACE BETWEEN SAID CORE AND TUBE AND THE INTERSTICES BETWEEN THE WINDINGS OF SAID WIRE AND GAS-TIGHTLY ENCLOSING SAID WIRE.
Claim 2
Dependent Claim
67 words
A RESISTANCE ELEMENT FOR PYROMETERS, COMPRISING A PORCELAIN CORE, A WIRE OF A METAL HAVING A HIGH MELTING POINT AND LOW CHEMICAL AFFINITY WOUND ON SAID CORE, A PORCELAIN TUBE TIGHTLY SURROUNDING SAID CORE AND WIRE, AND A GLAZE HAVING A HIGH POINT OF FUSION FULLING THE SPACE BETWEEN SAID CORE AND TUBE AND THE INTERSTICES BETWEEN THE WINDINGS OF SAID WIRE AND GAS-TIGHTLY ENCLOSING SAID WIRE.
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) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |