US3468812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of preparing an alkaline earth halophosphate
Assignee: US Philips Corp
•
Filing: 1966-07-13
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Granted: 1969-09-23
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Expires: 1986-07-13
Abstract
No abstract record available.
Inventors
- 👤 Willem Lambertus Wanmaker
- 👤 Age Hylke Hoekstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:22
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/74; C09K11/75; C09K11/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE500552A
Cited
US3109819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |