Patent US6458516B1 successfully refreshed from Google Patents.
US4043387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heat pipe with improved compatability
Assignee: Raytheon Co
•
Filing: 1976-11-26
•
Granted: 1977-08-23
•
Expires: 1996-11-26
Abstract
Abstract Tantalum and like metals, when added to a water/ferrous metal heat pipe in the form of a foil, gauze or wire, acts as a hydrogen getter in order to counteract the otherwise incompatability of the heat pipe enclosure material with the water working fluid.
Inventors
- 👤 Thomas R. Lamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:43
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/0258; F28D15/04; F28D15/046
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
45 words
In a heat pipe including an enclosure and water as a working fluid in which the enclosure is formed of a material which combines with the water to generate hydrogen gas, the improvement comprising a getter selected from material having an affinity for hydrogen gas.
Claim 2
Dependent Claim
45 words
In a heat pipe including an enclosure and water as a working fluid in which the enclosure is formed of a material which combines with the water to generate hydrogen gas, the improvement comprising a getter selected from material having an affinity for hydrogen gas.
Claim 3
Dependent Claim
16 words
The heat pipe improvement as in claim 1 wherein said getter is tantalum, titanium or niobium.
Claim 4
Dependent Claim
19 words
The heat pipe improvement as in claim 1 wherein said getter comprises foil with holes therein for vapor communication.
Claim 5
Dependent Claim
20 words
The heat pipe improvement as in claim 1 wherein said getter comprises a cylinder with holes therein for vapor communication.
Claim 6
Dependent Claim
14 words
The heat pipe improvement as in claim 1 wherein said getter comprises particulate matter.
Claim 7
Dependent Claim
14 words
The heat pipe improvement as in claim 1 wherein said getter comprises fibrous material.
References Cited (Backward Citations)
US3503438A
Cited
US3884296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |