Patent US3843409A successfully refreshed from Google Patents.
US3843409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger cleaning system
Assignee: Hydro Vel Services Inc
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Filing: 1972-09-25
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Granted: 1974-10-22
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Expires: 1992-09-25
Abstract
Abstract 1. A METHOD OF CLEANING HEAT EXCHANGERS INCLUDING THE STEP OF: POSITIONING A HEAT EXCHANGER TUBE BUNDLE AT A CLEANING STATION; MOVING A CLEANING HEAD LINEARLY ALONG A PLURALITY OF PATHS EACH EXTENDING GENERALLY LONGITUDINALLY OF THE POSITIONED AT ARCUATELY SPACED POINTS IN AN ARC AROUND THE TUBE BUNDLE; AND DISCHARGING CLEANING MATERIAL FROM THE HEAD DURING THE MOVEMENT THEREOF. D R A W I N G
Inventors
- 👤 C Ice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:35
CPC Classifications
F; F28; F28G; F28G15/00; F28G15/02; F28G13/00; F28G9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD OF CLEANING HEAT EXCHANGERS INCLUDING THE STEP OF: POSITIONING A HEAT EXCHANGER TUBE BUNDLE AT A CLEANING STATION; MOVING A CLEANING HEAD LINEARLY ALONG A PLURALITY OF PATHS EACH EXTENDING GENERALLY LONGITUDINALLY OF THE POSITIONED AT ARCUATELY SPACED POINTS IN AN ARC AROUND THE TUBE BUNDLE; AND DISCHARGING CLEANING MATERIAL FROM THE HEAD DURING THE MOVEMENT THEREOF.
Claim 2
Independent Claim
59 words
A METHOD OF CLEANING HEAT EXCHANGERS INCLUDING THE STEP OF: POSITIONING A HEAT EXCHANGER TUBE BUNDLE AT A CLEANING STATION; MOVING A CLEANING HEAD LINEARLY ALONG A PLURALITY OF PATHS EACH EXTENDING GENERALLY LONGITUDINALLY OF THE POSITIONED AT ARCUATELY SPACED POINTS IN AN ARC AROUND THE TUBE BUNDLE; AND DISCHARGING CLEANING MATERIAL FROM THE HEAD DURING THE MOVEMENT THEREOF.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |