Patent US2620588A successfully refreshed from Google Patents.
Patent US2594129A successfully refreshed from Google Patents.
US2594129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing surfaces for tinning
Assignee: Airco Inc
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Filing: 1948-04-10
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Granted: 1952-04-22
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Expires: 1968-04-10
Abstract
No abstract record available.
Inventors
- 👤 Francis T Crego
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:08
CPC Classifications
C; C21; C21D; C21D3/00; C21D3/02; C21D3/04; C23; C23C; C23C2/00; C23C2/04; C23C2/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
THE METHOD OF CONVERTING IRON CARBIDE AT THE SURFACE OF FERROUS TINPLATE STOCK TO FERRITE PREPARATORY TO COATING SAID STOCK WITH TIN WHICH COMPRISES MAINTAINING THE SURFACE OF THE STOCK HAVING THE IRON CARBIDE THEREAT, WHILE AT AN ANNEALING TEMPERATURE, IN INTIMATE CONTACT WITH
Claim 2
Independent Claim
44 words
THE METHOD OF CONVERTING IRON CARBIDE AT THE SURFACE OF FERROUS TINPLATE STOCK TO FERRITE PREPARATORY TO COATING SAID STOCK WITH TIN WHICH COMPRISES MAINTAINING THE SURFACE OF THE STOCK HAVING THE IRON CARBIDE THEREAT, WHILE AT AN ANNEALING TEMPERATURE, IN INTIMATE CONTACT WITH
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) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |