US3394521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block for refractory linings
Assignee: Individual
•
Filing: 1967-07-05
•
Granted: 1968-07-30
•
Expires: 1987-07-05
Abstract
No abstract record available.
Inventors
- 👤 Coleman Myron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:43
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB185817A
Cited
US1586194A
Cited
GB521135A
Cited
GB635159A
Cited
FR929841A
Cited
US2877506A
Cited
US2818248A
Cited
US3139846A
Cited
US3132447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |