US2317209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated fibrous materials
Assignee: Kendall Refining Co
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Filing: 1940-08-03
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Granted: 1943-04-20
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Expires: 1960-08-03
Abstract
No abstract record available.
Inventors
- 👤 Wilbert B Mccluer
- 👤 Ralph W Hufferd
- 👤 Frank J Philippbar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:58
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/48; D; D21; D21H; D21H17/00; D21H17/62; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T442/00; Y10T442/20; Y10T442/2213; Y10T442/2475; Y10T442/25; Y10T442/2549; Y10T442/2574; Y10T442/2631
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) | 1946-04-19 | 1946-10-19 | 1947-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-04-19 | 1950-10-19 | 1951-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-04-19 | 1954-10-19 | 1955-04-20 | $7700.00 | Window Closed / Lapsed |