US2291568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube covering and method of making
Assignee: Union Asbestos and Rubber Co
•
Filing: 1941-10-29
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Granted: 1942-07-28
•
Expires: 1961-10-29
Abstract
No abstract record available.
Inventors
- 👤 John H Balch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:45
CPC Classifications
D; D04; D04C; D04C1/00; D04C1/06; D04C3/00; D04C3/40; D10; D10B; D10B2403/00; D10B2403/02; D10B2403/024; D10B2403/0243
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-07-27 | 1946-01-26 | 1946-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-27 | 1950-01-26 | 1950-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-27 | 1954-01-26 | 1954-07-28 | $7700.00 | Window Closed / Lapsed |