US3118438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable draft regulator
Assignee: Aerometric Furnace Control Inc
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Filing: 1961-07-24
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Granted: 1964-01-21
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Expires: 1981-07-24
Abstract
No abstract record available.
Inventors
- 👤 Frank R Sykes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:03
CPC Classifications
F; F23; F23M; F23M9/00; F23M9/003; F23M9/006; F23L; F23L11/00; F23L11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN A DRAFT REGULATOR FOR INSERTION BETWEEN ALINED SECTIONS OF A FLUE PIPE, AN OUTLET UNIT HAVING A GENERALLY CYLINDRICAL SKIRT NECKED TO AN EGRESS COLLAR, A SLEEVE ADJUSTABLE ENDWISE WITHIN SAID COLLAR AND ADAPTED TO INTERFIT WITH A FLUE PIPE SECTION, AND AN INLET SECTION HAVING AN INTERMEDIATE EXPANSION CHAMBER DEFINED AT ONE END BY A FRUSTRO-CONICAL DIVERTER WALL WHICH NARROWS TO A DIAMETER
Claim 2
Dependent Claim
65 words
IN A DRAFT REGULATOR FOR INSERTION BETWEEN ALINED SECTIONS OF A FLUE PIPE, AN OUTLET UNIT HAVING A GENERALLY CYLINDRICAL SKIRT NECKED TO AN EGRESS COLLAR, A SLEEVE ADJUSTABLE ENDWISE WITHIN SAID COLLAR AND ADAPTED TO INTERFIT WITH A FLUE PIPE SECTION, AND AN INLET SECTION HAVING AN INTERMEDIATE EXPANSION CHAMBER DEFINED AT ONE END BY A FRUSTRO-CONICAL DIVERTER WALL WHICH NARROWS TO A DIAMETER
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) | 1967-01-20 | 1967-07-22 | 1968-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-20 | 1971-07-22 | 1972-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-20 | 1975-07-22 | 1976-01-21 | $7700.00 | Window Closed / Lapsed |