Patent US3412548A successfully refreshed from Google Patents.
US3412548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of blending ceramic and carrier fibers
Assignee: Johns Manville Corp
•
Filing: 1966-08-24
•
Granted: 1968-11-26
•
Expires: 1986-08-24
Abstract
No abstract record available.
Inventors
- 👤 Poltorak Emil Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:20
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/70; D04H1/72; D01; D01G; D01G13/00; D02; D02G; D02G3/00; D02G3/02; D02G3/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |