US2995477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boiler cleaning process
Assignee: Celanese Corp
•
Filing: 1955-05-26
•
Granted: 1961-08-08
•
Expires: 1975-05-26
Abstract
No abstract record available.
Inventors
- 👤 Albert G Florence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:48
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C23; C23G; C23G1/00; C23G1/02; F; F28; F28G; F28G9/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
53 words
PROCESS FOR CLEANING SCALY BOILERS WHICH COMPRISES INTRODUCING AN ORGANIC ACID INTO THE WATER CONTAINED IN SAID SCALY BOILERS TO BRING THE PH THEREOF TO BETWEEN ABOUT 3 AND 5, AND HOLDING THE WATER IN SAID BOILERS AT AN ELEVATED TEMPERATURE OF AT LEAST ABOUT 100*C. UNTIL THE CLEANING HAS BEEN CARRIED OUT.
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) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |