US2489246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic rutile and method of making same
Assignee: NAT LCAD Co
•
Filing: 1943-06-09
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Granted: 1949-11-22
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Expires: 1963-06-09
Abstract
No abstract record available.
Inventors
- 👤 Wainer Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:32
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/08; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C09C3/00; C09C3/04; C09C3/043; C09C3/06; C01; C01P; C01P2002/00; C01P2002/60; C01P2006/00; C01P2006/40; C01P2006/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2071452A
Cited
US2272331A
Cited
GB517742A
Cited
US2339003A
Cited
US2286882A
Cited
US2360479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |