US2759862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating compositions and method of treating ferrous surfaces therewith
Assignee: Devex Corp
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Filing: 1952-03-11
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Granted: 1956-08-21
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Expires: 1972-03-11
Abstract
No abstract record available.
Inventors
- 👤 John A Henricks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:24
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
IN A PROCESS OF TREATING FERROUS SURFACES TO PRODUCE AN ADHERENT COATING THEREON FOR SUBSEQUENT DRAWING AND DEFORMING, THE STEP OF SUBJECTING THE FERROUS SURFACE TO AN AQUEOUS BATH AT FROM ROOM TEMPERATURE TO APPROXIMATELY 190* F. CONTAINING THE FOLLOWING INGREDIENTS:
Claim 2
Dependent Claim
41 words
IN A PROCESS OF TREATING FERROUS SURFACES TO PRODUCE AN ADHERENT COATING THEREON FOR SUBSEQUENT DRAWING AND DEFORMING, THE STEP OF SUBJECTING THE FERROUS SURFACE TO AN AQUEOUS BATH AT FROM ROOM TEMPERATURE TO APPROXIMATELY 190* F. CONTAINING THE FOLLOWING INGREDIENTS:
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) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |