Patent US2894919A successfully refreshed from Google Patents.
US3416935A
Expired / Lapsed
US
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Insulating refractories
Assignee: Dresser Industries Inc
•
Filing: 1965-07-02
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Granted: 1968-12-17
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Expires: 1985-07-02
Abstract
No abstract record available.
Inventors
- 👤 Einstein Edward
- 👤 Mccreight Donald Orr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:16
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/06; C04B38/063; C04B38/0635; C04B38/0645; C04B38/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2588646A
Cited
US2996389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |