US3202531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating steel surface with alkali silicate and zinc dust
Assignee: Napko Corp
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Filing: 1962-07-27
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Granted: 1965-08-24
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Expires: 1982-07-27
Abstract
No abstract record available.
Inventors
- 👤 Dowd James Patrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:49
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/10; C09D5/106; C04; C04B; C04B28/00; C04B28/24; C04B28/26; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE METHOD OF CURRING A COATING ON A STEEL SURFACE, SAID COATING CONSISTING OF THE DRIED FILM OF AN ALKALI SILICATE AND ZINC DUST, WHICH COMPRISES APPLYING TO SAID COATING, THE REACTION PRODUCT OF PHOSPHORIC ACID AND PROPYLENE OXIDE WHEREIN THE MOLE RATIO OF PROPYLENE OXIDE IS BE TWEEN 0.25 AND 0.55 TO ONE MOLE OF PHOSPHORIC ACID.
Claim 2
Independent Claim
58 words
THE METHOD OF CURRING A COATING ON A STEEL SURFACE, SAID COATING CONSISTING OF THE DRIED FILM OF AN ALKALI SILICATE AND ZINC DUST, WHICH COMPRISES APPLYING TO SAID COATING, THE REACTION PRODUCT OF PHOSPHORIC ACID AND PROPYLENE OXIDE WHEREIN THE MOLE RATIO OF PROPYLENE OXIDE IS BE TWEEN 0.25 AND 0.55 TO ONE MOLE OF PHOSPHORIC ACID.
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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |