Patent US3336974A successfully refreshed from Google Patents.
US3336974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Serpentine tube boiler
Assignee: RTX Corp
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Filing: 1965-05-05
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Granted: 1967-08-22
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Expires: 1985-05-05
Abstract
No abstract record available.
Inventors
- 👤 Bernstein Ernest
- 👤 David G Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:49
CPC Classifications
F; F22; F22B; F22B3/00; F22B3/02; F22B1/00; F22B1/02; F22B1/06; F22B1/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A LIQUID METAL BOILER OF THE SHELL AND TUBE TYPE, A GENERALLY CYLINDRICAL TUBE BUNDLE COMPRISING: A PLURALITY OF SUBSTANTIALLY IDENTICAL TUBES NESTED IN JUXTAPOSITION IN CIRCUMFERENTIAL LAYERS ABOUT THE AXIS OF THE TUBE BUNDLE, EACH OF SAID TUBES HAVING A SERPENTINE CONFIGURATION OVER A MAJOR PORTION OF ITS LENGTH, MEANS FOR SUPPORTING SAID TUBES IN RADIAL AND CIRCUMFERENTIAL SPACED RELATION ABOUT THE AXIS OF THE TUBE BUNDLE, AND A FLASHING ORIFICE INTERNAL OF EACH TUBE INTERMEDIATE ITS LENGTH, EACH ORIFICE BEING OF EQUAL SIZE AND POSITIONED LONGITUDINALLY OF THE TUBE BUNDLE IN SUBSTANTIAL CORRESPONDENCE WITH EACH OTHER ORIFICE.
Claim 2
Dependent Claim
100 words
IN A LIQUID METAL BOILER OF THE SHELL AND TUBE TYPE, A GENERALLY CYLINDRICAL TUBE BUNDLE COMPRISING: A PLURALITY OF SUBSTANTIALLY IDENTICAL TUBES NESTED IN JUXTAPOSITION IN CIRCUMFERENTIAL LAYERS ABOUT THE AXIS OF THE TUBE BUNDLE, EACH OF SAID TUBES HAVING A SERPENTINE CONFIGURATION OVER A MAJOR PORTION OF ITS LENGTH, MEANS FOR SUPPORTING SAID TUBES IN RADIAL AND CIRCUMFERENTIAL SPACED RELATION ABOUT THE AXIS OF THE TUBE BUNDLE, AND A FLASHING ORIFICE INTERNAL OF EACH TUBE INTERMEDIATE ITS LENGTH, EACH ORIFICE BEING OF EQUAL SIZE AND POSITIONED LONGITUDINALLY OF THE TUBE BUNDLE IN SUBSTANTIAL CORRESPONDENCE WITH EACH OTHER ORIFICE.
References Cited (Backward Citations)
US1525094A
Cited
US1748121A
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US1815932A
Cited
US2519084A
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US3118497A
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US3134432A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |