US2990601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making refractory objects
Assignee: Laboratory Equipment Corp
•
Filing: 1958-11-21
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Granted: 1961-07-04
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Expires: 1978-11-21
Abstract
No abstract record available.
Inventors
- 👤 Harold C Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:54
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/54; B28B1/30; B28B1/32; C; C04; C04B; C04B35/00; C04B35/622; C04B35/653; Y; Y10; Y10S; Y10S264/00; Y10S264/72
Claims Analysis
Total Claims: 0
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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) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |