Patent US3236044A successfully refreshed from Google Patents.
US3236044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating system for motor vehicles
Assignee: Individual
•
Filing: 1963-12-20
•
Granted: 1966-02-22
•
Expires: 1983-12-20
Abstract
No abstract record available.
Inventors
- 👤 Ruge Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:42
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2046; B; B60; B60H; B60H1/00; B60H1/02; B60H1/14; B60H1/18; F01N3/2053; F01N3/24; F01N3/28; F01N3/2882; F01N3/2889; F01N3/30; F01N5/00; F01N5/02; F01N2230/00; F01N2230/04; F01N2240/00; F01N2240/02; F01N2260/00; F01N2260/02; F01N2260/022; F01N2410/00; F01N2410/02; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
K HEATING SYSTEM FOR MOTOR VEHICLES COMPRISING AN EXHAUST PIPE CONNECTED TO AN INTERNAL COMBUSTION ENGINE AND LEADING TO THE ATMOSPHERE, A JACKET SURROUNDING THE GREATER PART OF THE EXHAUST PIPE TO FORM A PASSAGE FOR AIR TO BE HEATED BY THE EXHAUST GASES IN THE EXHAUST PIPE, A PIPE WITH PERFORATIONS THEREIN ARRANGED IN THE EXHAUST PIPE AND SURROUNDED BY A CATALYST TO PROVIDE ADDITIONAL HEAT WHEN THE EXHAUST GASES ARE BY-PASSED THROUGH THE CATALYST, SAID CATALYST AROUND THE SECOND-MENTIONED PIPE FORMING AN OUTER ANNULAR PASSAGE FOR THE EXHAUST GASES WITH THE EXHAUST PIPE, AND A ROTARY SLEEVE VALVE AROUND THE SECOND-MENTIONED PIPE TO CLOSE OFF OR ADMIT THE EXHAUST GASES AROUND THE CATALYST IN THE ANNULAR PASSAGE OR THROUGH THE CATALYST THROUGH THE PERFORATIONS AND THEN INTO THE ANNULAR PASSAGE.
Claim 2
Dependent Claim
132 words
K HEATING SYSTEM FOR MOTOR VEHICLES COMPRISING AN EXHAUST PIPE CONNECTED TO AN INTERNAL COMBUSTION ENGINE AND LEADING TO THE ATMOSPHERE, A JACKET SURROUNDING THE GREATER PART OF THE EXHAUST PIPE TO FORM A PASSAGE FOR AIR TO BE HEATED BY THE EXHAUST GASES IN THE EXHAUST PIPE, A PIPE WITH PERFORATIONS THEREIN ARRANGED IN THE EXHAUST PIPE AND SURROUNDED BY A CATALYST TO PROVIDE ADDITIONAL HEAT WHEN THE EXHAUST GASES ARE BY-PASSED THROUGH THE CATALYST, SAID CATALYST AROUND THE SECOND-MENTIONED PIPE FORMING AN OUTER ANNULAR PASSAGE FOR THE EXHAUST GASES WITH THE EXHAUST PIPE, AND A ROTARY SLEEVE VALVE AROUND THE SECOND-MENTIONED PIPE TO CLOSE OFF OR ADMIT THE EXHAUST GASES AROUND THE CATALYST IN THE ANNULAR PASSAGE OR THROUGH THE CATALYST THROUGH THE PERFORATIONS AND THEN INTO THE ANNULAR PASSAGE.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |