US3501271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tio2 precipitation process
Assignee: British Titan Products Co Ltd
•
Filing: 1967-10-04
•
Granted: 1970-03-17
•
Expires: 1987-10-04
Abstract
No abstract record available.
Inventors
- 👤 Walter Twist
- 👤 Leslie John Lawrence
- 👤 Tom Lloyd Cordey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:15
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/053; C01G23/0532; C01G23/0534; C09C3/00; C09C3/04; C09C3/043; C09C3/06; C01P; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1795467A
Cited
GB447744A
Cited
US2361987A
Cited
US2368591A
Cited
US2452390A
Cited
US2503692A
Cited
US2531926A
Cited
US2850357A
Cited
US3211528A
Cited
US3091515A
Cited
US3341291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |