US3456914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic fiber riser sleeves
Assignee: Johns Manville Corp
•
Filing: 1965-10-23
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Granted: 1969-07-22
•
Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Howard Edwin Konrad
- 👤 Sidney Speil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:15
CPC Classifications
C; C04; C04B; C04B28/00; B; B22; B22D; B22D7/00; B22D7/06; B22D7/10; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA708524A
Cited
US1989096A
Cited
US2366485A
Cited
GB843098A
Cited
US3072981A
Cited
US3173451A
Cited
US3262165A
Cited
US3321171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |