Patent US3463646A successfully refreshed from Google Patents.
US3463646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-crystalline ground coats having controlled p2o5/b2o3 ratio
Assignee: Pfaudler Inc
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Filing: 1964-11-20
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Granted: 1969-08-26
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Expires: 1984-11-20
Abstract
No abstract record available.
Inventors
- 👤 John R Little
- 👤 Elbert A Sanford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:26
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/097; C03C10/00; C03C10/0054; C03C8/00; C03C8/02; C03C8/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |