US2741822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of refractory products
Assignee: Unifrax I LLC
•
Filing: 1951-01-29
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Granted: 1956-04-17
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Expires: 1971-01-29
Abstract
No abstract record available.
Inventors
- 👤 Marvin J Udy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:57
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/64; C04B35/65; C04B35/651; C04B35/66; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3217; C04B2235/34; C04B2235/3418; Y; Y10; Y10S; Y10S264/00; Y10S264/63
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2568157A
Cited
US1856303A
Cited
US1911189A
Cited
GB402203A
Cited
US2043867A
Cited
US1934263A
Cited
US2347968A
Cited
US2454733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |