Patent US3299288A successfully refreshed from Google Patents.
Patent US2294562A successfully refreshed from Google Patents.
US2294562A
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Carbonized steel strip and method of making same
Assignee: HYGRADE SYIVANIA Corp
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Filing: 1939-07-15
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Granted: 1942-09-01
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Expires: 1959-07-15
Abstract
No abstract record available.
Inventors
- 👤 Walter E Kingston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:56
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/26; H; H01; H01J; H01J19/00; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0019; H01J2893/0022; H01J2893/0023; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12625; Y10T428/12771; Y10T428/12861; Y10T428/12937; Y10T428/12944; Y10T428/12951; Y10T428/12958; Y10T428/12972; Y10T428/12986
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-08-31 | 1946-03-02 | 1946-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-08-31 | 1950-03-02 | 1950-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-08-31 | 1954-03-02 | 1954-09-01 | $7700.00 | Window Closed / Lapsed |