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Patent US993913A successfully refreshed from Google Patents.
US993913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon-oxygen product.
Assignee: Unifrax I LLC
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Filing: 1907-01-18
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Granted: 1911-05-30
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Expires: 1927-01-18
Abstract
No abstract record available.
Inventors
- 👤 Frank J Tone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:25
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113
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) | 1914-05-29 | 1914-11-28 | 1915-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-05-29 | 1918-11-28 | 1919-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-05-29 | 1922-11-28 | 1923-05-30 | $7700.00 | Window Closed / Lapsed |