US2717845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal descaling methods
Assignee: Individual
•
Filing: 1947-01-09
•
Granted: 1955-09-13
•
Expires: 1967-01-09
Abstract
No abstract record available.
Inventors
- 👤 Roy E Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:43
CPC Classifications
C; C23; C23G; C23G3/00; C23G3/02; C23G3/027; C23G3/028; C23G1/00; C23G1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN THE TREATMENT OF AN ELONGATED METAL PIECE METHOD STEPS INCLUDING MOVING THE ELONGATED METAL PIECE LONGITUDINALLY IN ONE DIRECTION AND SUCCESSIVELY SUBJECTING SUCCESSIVE PORTIONS OF THE METAL PIECE TO A PLURALITY OF DIFFERENT ACTIONS IN SEQUENCE, AS FOLLOWS; HEATING BY CONTACT WITH ONE OR MORE HOT GASES, A FIRST HEATING SUBSEQUENT TO THE GAS HEATING, IMMERSION IN A BATH OF NONACID DESCALING LIQUID MATERIAL CONSISTING OF MOLTEN SODIUM HYDROXIDE AND MOLTEN SODIUM HYDRIDE, A SECOND HEATING SUBSEQUENT TO THE IMMERSION, AND IMPINGEMENT BY WATER SPRAYS.
Claim 2
Dependent Claim
86 words
IN THE TREATMENT OF AN ELONGATED METAL PIECE METHOD STEPS INCLUDING MOVING THE ELONGATED METAL PIECE LONGITUDINALLY IN ONE DIRECTION AND SUCCESSIVELY SUBJECTING SUCCESSIVE PORTIONS OF THE METAL PIECE TO A PLURALITY OF DIFFERENT ACTIONS IN SEQUENCE, AS FOLLOWS; HEATING BY CONTACT WITH ONE OR MORE HOT GASES, A FIRST HEATING SUBSEQUENT TO THE GAS HEATING, IMMERSION IN A BATH OF NONACID DESCALING LIQUID MATERIAL CONSISTING OF MOLTEN SODIUM HYDROXIDE AND MOLTEN SODIUM HYDRIDE, A SECOND HEATING SUBSEQUENT TO THE IMMERSION, AND IMPINGEMENT BY WATER SPRAYS.
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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) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |