US4377553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duct and cladding alloy
Assignee: United States Department of Energy
•
Filing: 1980-05-28
•
Granted: 1983-03-22
•
Expires: 2000-05-28
Abstract
Abstract An austenitic alloy having good thermal stability and resistance to sodium corrosion at 700 DEG C. consists essentially of 35-45% nickel 7.5-14% chromium 0.8-3.2% molybdenum 0.3-1.0% silicon 0.2-1.0% manganese 0-0.1% zirconium 2.0-3.5% titanium 1.0-2.0% aluminum 0.02-0.1% carbon 0-0.01% boron and the balance iron.
Inventors
- 👤 Michael K. Korenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:54
CPC Classifications
C; C22; C22C; C22C30/00; C22C38/00; C22C38/18; C22C38/40; C22C38/54; C22C38/44; C22C38/50
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
18 words
An austenitic alloy consisting essentially of nickel--40% chromium--10.5% molybdenum--2.0% silicon--0.5% manganese--0.2% zirconium--0.05% titanium--3.3% aluminum--1.7% carbon--0.03% boron--0.005% balance iron.
Claim 2
Dependent Claim
18 words
An austenitic alloy consisting essentially of nickel--40% chromium--10.5% molybdenum--2.0% silicon--0.5% manganese--0.2% zirconium--0.05% titanium--3.3% aluminum--1.7% carbon--0.03% boron--0.005% balance iron.
Claim 3
Dependent Claim
9 words
A duct fabricated from the alloy of claim 1.
References Cited (Backward Citations)
US4129462A
Cited
US4236943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |