US3841099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Working fluids for external combustion engines
Assignee: Union Carbide Corp
•
Filing: 1973-10-17
•
Granted: 1974-10-15
•
Expires: 1993-10-17
Abstract
Abstract Water-pyridine mixtures containing about 25 to 90% by weight of pyridine have been found to be excellent working fluids for external combustion engines. Methyl substituted pyridines such as 2-methyl pyridine, 4-methyl pyridine, or 2,6-dimethyl pyridine, as well as 1,2-diazine, 1,3-diazine and 1,4-diazine can be substituted for pyridine itself.
Inventors
- 👤 G Somekh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:15
CPC Classifications
F; F01; F01K; F01K25/00; F01K25/06; F01K25/08; F01K25/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
53 words
METHOD OF CONVERTING HEAT ENERGY TO MECHANICAL ENERGY WHICH COMPRISES HEATING AN AQUEOUS NITROGEN-CONTAINING HYDROCARBON WORKING FLUID, TO THE VAPOR STATE, SAID WORKING FLUID CONTAINING ABOUT 25 TO 90 PERCENT BY WEIGHT OF A MONOCYCLIC NITROGEN-CONTAINING HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF PYRIDINE, 2-METHHYL PYRIDINE, 3-METHYL PYRIDINE, 4-METHYL PYRIDINE, 2,6-DIMETHYL PYRIDINE, 1,2-
Claim 2
Dependent Claim
53 words
METHOD OF CONVERTING HEAT ENERGY TO MECHANICAL ENERGY WHICH COMPRISES HEATING AN AQUEOUS NITROGEN-CONTAINING HYDROCARBON WORKING FLUID, TO THE VAPOR STATE, SAID WORKING FLUID CONTAINING ABOUT 25 TO 90 PERCENT BY WEIGHT OF A MONOCYCLIC NITROGEN-CONTAINING HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF PYRIDINE, 2-METHHYL PYRIDINE, 3-METHYL PYRIDINE, 4-METHYL PYRIDINE, 2,6-DIMETHYL PYRIDINE, 1,2-
Claim 3
Dependent Claim
13 words
Method claimed in claim 1 wherein the mono-cyclic nitrogen containing hydrocarbon is pyridine.
Claim 4
Dependent Claim
14 words
Method claimed in claim 1 wherein the mono-cyclic nitrogen containing hydrocarbon is 2-methyl pyridine.
Claim 5
Dependent Claim
14 words
Method claimed in claim 1 wherein the mono-cyclic nitrogen containing hydrocarbon is 3-methyl pyridine.
Claim 6
Dependent Claim
14 words
Method claimed in claim 1 wherein the mono-Cyclic nitrogen containing hydrocarbon is 4-methyl pyridine.
Claim 7
Dependent Claim
14 words
Method claimed in claim 1 wherein the mono-cyclic nitrogen containing hydrocarbon is 2,6-dimethyl pyridine.
Claim 8
Dependent Claim
13 words
Method claimed in claim 1 wherein the mono-cyclic nitrogen containing hydrocarbon is 1,2-diazine.
Claim 9
Dependent Claim
13 words
Method claimed in claim 1 wherein the mono-cyclic nitrogen containing hydrocarbon is 1,3-diazine.
Claim 10
Dependent Claim
13 words
Method claimed in claim 1 wherein the mono-cyclic nitrogen containing hydrocarbon is 1,4-diazine.
Claim 11
Dependent Claim
20 words
Method claimed in claim 1 wherein the heat energy is converted to mechanical energy in a Rankine Cycle engine system.
Claim 12
Dependent Claim
23 words
Method claimed in claim 10 wherein the working fluid contains about 50 to 80 per cent by weight of a mono-cyclic nitrogen-containing compound.
References Cited (Backward Citations)
US3516248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |