US2673728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and method of annealing
Assignee: CLARENCE B HOAK
•
Filing: 1950-04-24
•
Granted: 1954-03-30
•
Expires: 1970-04-24
Abstract
No abstract record available.
Inventors
- 👤 Grosskloss John Fredrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:39
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2483681A
Cited
GB191418471A
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US1264961A
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US1839515A
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US2311350A
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US2262609A
Cited
US2239523A
Cited
US2388888A
Cited
US2474301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |