US2478439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of impregnating fibrous articles
Assignee: Line Material Co
•
Filing: 1945-09-04
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Granted: 1949-08-09
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Expires: 1965-09-04
Abstract
No abstract record available.
Inventors
- 👤 Liedtke Rudolph H Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:40
CPC Classifications
B; B31; B31B; B31B50/00; D; D21; D21H; D21H17/00; D21H17/63; D21H17/70; B31B50/74; B31B50/742; B31B50/745; B31B50/75
Claims Analysis
Total Claims: 0
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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) | 1952-08-08 | 1953-02-07 | 1953-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-08 | 1957-02-07 | 1957-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-08 | 1961-02-07 | 1961-08-09 | $7700.00 | Window Closed / Lapsed |