US2670573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal treatment of ceramic objects
Assignee: Individual
•
Filing: 1950-02-13
•
Granted: 1954-03-02
•
Expires: 1970-02-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick W Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:12
CPC Classifications
C; C03; C03B; C03B27/00; C03B27/04; C03B27/06; C03B27/067; C03B25/00; C03B25/04; C03B25/06; C03B32/00; C03B32/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US170339A
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US208207A
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US248674A
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US343133A
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US1585542A
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US2132390A
Cited
GB477585A
Cited
US2203182A
Cited
US2292684A
Cited
US2339975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |