US3519446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic material
Assignee: Physical Sciences Corp
•
Filing: 1968-09-19
•
Granted: 1970-07-07
•
Expires: 1988-09-19
Abstract
No abstract record available.
Inventors
- 👤 John A Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:59
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/24; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091; C03C3/102; C03C3/105; C04; C04B; C04B37/00; C04B37/04; C04B37/042; C04B2235/00; C04B2235/65; C04B2235/656; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/343; C04B2237/345; C04B2237/346; C04B2237/40; C04B2237/405
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2844693A
Cited
US2949376A
Cited
US2907665A
Cited
US3106490A
Cited
US3110619A
Cited
US3184320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |