US2955061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoride coating on zirconium
Assignee: Parker Rust Proof Co
•
Filing: 1957-08-02
•
Granted: 1960-10-04
•
Expires: 1977-08-02
Abstract
No abstract record available.
Inventors
- 👤 Herbert A H Jenkins
- 👤 Dennis B Freeman
- 👤 George R King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:35
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37; C23C22/40; C23C22/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
AN AQUEOUS ACIDIC SOLUTION FOR PRODUCING A COATING ON SURFACES OFF ZIRCONIUM AND ZIRCONIUM BASE ALLOYS HAVING A PH BETWEEN 2 AND 6 AND CONSISTING ESSENTIALLY OF THE FLUORIDE ION IN CONCENTRATIONS BETWEEN M/8 AND 6M, POTASSIUM ION IN CONCENTRATION BETWEEN M/8 AND 2M EXCEPT THAT UP TO ONE-HALF OF THE POTASSIUM ION IS REPLACED BY AN EQUIVALENT AMOUNT OF ONE OR MORE OTHER ALALI METALS INCLUDING AMMONIUM ION, AND NITRATE ION, AND THE AMOUNT OF THE POTASSIUM ION BEING NOT LESS THAN 1/8 M.
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) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |