Patent US3179338A successfully refreshed from Google Patents.
US3179338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning system
Assignee: Carrier Corp
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Filing: 1961-01-30
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Granted: 1965-04-20
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Expires: 1981-01-30
Abstract
No abstract record available.
Inventors
- 👤 William S Ostrander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:25
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044; F24F3/048; F24F3/052; F24F3/0522
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A DUAL-DUCT AIR CONDITIONING SYSTEM COMPRISING MEANS FOR SUPPLYING COOL AIR; MEANS FOR SUPPLYING WARM AIR; A DISTRIBUTION UNIT HAVING A CASING INCLUDING A COOL AIR INLET CONNECTED TO SAID MEANS FOR SUPPLYING COOL AIR, A WARM AIR INLET CONNECTED TO SAID MEANS FOR SUPPLYING WARM AIR, AN AIR OUTLET COMMUNICATING WITH AN ENCLOSED AREA TO BE TREATED, FIRST DAMPER MEANS ADJACENT THE WARM AIR INLET, AND SECOND DAMPER MEANS ADJACENT THE COOL AIR INLET; FIRST CONTROL MEANS RESPONSIVE TO THE PRESSURE DIFFERENTIAL ACROSS A RESTRICTION PLATE IN THE CASING FOR ACTUATING THE FIRST DAMPER MEANS TO REGULATE THE FLOW OF
Claim 2
Dependent Claim
101 words
A DUAL-DUCT AIR CONDITIONING SYSTEM COMPRISING MEANS FOR SUPPLYING COOL AIR; MEANS FOR SUPPLYING WARM AIR; A DISTRIBUTION UNIT HAVING A CASING INCLUDING A COOL AIR INLET CONNECTED TO SAID MEANS FOR SUPPLYING COOL AIR, A WARM AIR INLET CONNECTED TO SAID MEANS FOR SUPPLYING WARM AIR, AN AIR OUTLET COMMUNICATING WITH AN ENCLOSED AREA TO BE TREATED, FIRST DAMPER MEANS ADJACENT THE WARM AIR INLET, AND SECOND DAMPER MEANS ADJACENT THE COOL AIR INLET; FIRST CONTROL MEANS RESPONSIVE TO THE PRESSURE DIFFERENTIAL ACROSS A RESTRICTION PLATE IN THE CASING FOR ACTUATING THE FIRST DAMPER MEANS TO REGULATE THE FLOW OF
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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |