Patent US3534131A successfully refreshed from Google Patents.
US3534131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of utilizing a graphite parting layer to separate refractory articles during sintering
Assignee: VITRO Corp A CORP OF DE
•
Filing: 1968-10-16
•
Granted: 1970-10-13
•
Expires: 1988-10-16
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Gebler
- 👤 Martin H Ortner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:04
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/28; C04B33/30; C04B35/00; C04B35/66
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3050813A
Cited
US2974388A
Cited
US3016597A
Cited
US3016598A
Cited
US3223607A
Cited
US3396220A
Cited
US3404079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |