US3273638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Finned tube protector
Assignee: Individual
•
Filing: 1964-07-01
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Granted: 1966-09-20
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Expires: 1984-07-01
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Darling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:43
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/007; F28F9/013; F28F9/0138; F28F1/00; F28F1/10; F28F1/12; F28F1/34; F28F1/36; F28F21/00; F28F21/06; F28F21/067
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
136 words
IN COMBINATION WITH A FINNED TUBE INCLUDING A CENTRAL TUBE HAVING A PLURALITY OF RADIALLY EXTENDING RIBS ON THE OUTER PERIPHERY THEREOF, A REMOVABLE FIN PROTECTOR COMPRISING A PAIR OF COMPLEMENTARY SEMI-CIRCULAR HOUSING COOPERATING FOR ENCASING A PLURALITY OF ADJACENT FINS, EACH OF SAID SEMI-CIRCULAR HOUSINGS COMPRISING AN ARCUATE OUTER HOUSING HAVING AN INNER DIAMETER SLIGHTLY GRATER THAN THE OUTER DIAMETER OF THE FINS, A RADIALLY INWARDLY DIRECTED RIB MEMBER CARRIED BY THE OUTER HOUSING AND HAVING AN INNER DIAMETER SUBSTANTIALLY EQUAL TO THE OUTER DIAMETER OF THE DENTRAL TUBE FOR ENGAGEMENT THEREWITH, AND AN ANGULAR FLANGE PROVIDED ON THE OUTER ENDS OF THE RIB FOR EXTENDING THE INNER PERIPHERY THEREOF THROUGH AN ARC GREATER THAN ONE HALF THE CIRCUMFERENCE OF THE CENTRAL TUBE FOR FACILITATING SECURING OF THE COMPLEMENTARY SEMICIRCULAR HOUSINGS AROUND THE CENTRAL TUBE.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |