US3449071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alumina crystals from a vapor phase reaction by monitoring the spectral scattering of light
Assignee: LEXINGTON LAB Inc
•
Filing: 1965-09-28
•
Granted: 1969-06-10
•
Expires: 1985-09-28
Abstract
No abstract record available.
Inventors
- 👤 William B Campbell
- 👤 William D Kingery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:34
CPC Classifications
C; C30; C30B; C30B25/00; C30B25/005; C01; C01F; C01F7/00; C01F7/02; C30B25/02; C30B25/16; C30B25/165; C30B29/00; C30B29/10; C30B29/16; C30B29/20; C01P; C01P2004/00; C01P2004/10; C01P2004/20; C01P2004/22; C01P2004/30; C01P2004/40; C01P2004/60; Y; Y10; Y10S; Y10S148/00; Y10S148/057; Y10S148/118; Y10S148/15; Y10S148/162
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2269674A
Cited
US2316239A
Cited
US2694335A
Cited
US2816479A
Cited
US3148027A
Cited
US3068113A
Cited
US3094385A
Cited
US3330960A
Cited
US3365316A
Cited
US3296446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |