US3528919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic ceramic compositions
Assignee: Canadian Patents and Development Ltd
•
Filing: 1966-03-28
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Granted: 1970-09-15
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Expires: 1986-03-28
Abstract
No abstract record available.
Inventors
- 👤 Vern M Mcnamara
- 👤 Ian F Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:49
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/49; C04B35/491; C01; C01B; C01B13/00; C01B13/14; C01B13/36; C01B13/363; C01G; C01G25/00; C01G25/006; C04B35/26; C04B35/2683; C04B35/622; C04B35/626; C04B35/62605; C04B35/62645; C04B35/62655; C01P; C01P2002/00; C01P2002/70; C01P2002/72; C01P2006/00; C01P2006/40; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3231; C04B2235/3232; C04B2235/3234; C04B2235/3244; C04B2235/3248; C04B2235/44; C04B2235/443; C04B2235/70; C04B2235/74; C04B2235/76; C04B2235/768
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2906710A
Cited
GB664086A
Cited
GB717269A
Cited
US2737444A
Cited
GB790093A
Cited
GB869554A
Cited
US3136605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |