US3228456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus employing hollow polyfluorinated plastic filaments for heat exchange
Assignee: Ametek Inc
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Filing: 1965-03-01
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Granted: 1966-01-11
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Expires: 1985-03-01
Abstract
No abstract record available.
Inventors
- 👤 Peter F Brown
- 👤 Martval J Hartig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:23
CPC Classifications
F; F22; F22D; F22D1/00; F22D1/16; F22B; F22B1/00; F22B1/02; F22B1/08; F28; F28D; F28D7/00; F28D7/16; F28D7/1607; F28F; F28F21/00; F28F21/06; F28F21/062; F28F21/08; F28F21/081; F28F21/082; F28F21/084; F28F9/00; F28F9/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METHOD OF TRANSFERRING HEAT BETWEEN TWO FLUID MASSES COMPRISING PASSING A FLUID MASS THROUGH THE INTERIOR AND DIRECTLY IN CONTACT WITH THE INNER PLASTIC SURFACES OF A PLURALITY OF HOLLOW FILAMENTS OF POLYFLUORINATED PLASTIC HAVING A SIZE RANGING FROM 5 TO 275 MILS OUTSIDE DIAMETER WITH A WALL THICKNESS RANGING FROM 0.5 TO 30 MILS AND DIRECTLY CONTACINT SUBSTANTIALLY THE ENTIRE OUTER PLASTIC SURFACES OF SAID HOLLOW FILAMENTS WITH A FLUID MASS HAVING AN OVER-ALL TEMPERATURE DIFFERENCE FROM THE FLUID MASS PASSING THROUGHT THE INTERIOR OF SAID HOLLOW FILAMENTS.
Claim 2
Independent Claim
90 words
A METHOD OF TRANSFERRING HEAT BETWEEN TWO FLUID MASSES COMPRISING PASSING A FLUID MASS THROUGH THE INTERIOR AND DIRECTLY IN CONTACT WITH THE INNER PLASTIC SURFACES OF A PLURALITY OF HOLLOW FILAMENTS OF POLYFLUORINATED PLASTIC HAVING A SIZE RANGING FROM 5 TO 275 MILS OUTSIDE DIAMETER WITH A WALL THICKNESS RANGING FROM 0.5 TO 30 MILS AND DIRECTLY CONTACINT SUBSTANTIALLY THE ENTIRE OUTER PLASTIC SURFACES OF SAID HOLLOW FILAMENTS WITH A FLUID MASS HAVING AN OVER-ALL TEMPERATURE DIFFERENCE FROM THE FLUID MASS PASSING THROUGHT THE INTERIOR OF SAID HOLLOW FILAMENTS.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |