US1826301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating
Assignee: National Tube Co
•
Filing: 1928-05-31
•
Granted: 1931-10-06
•
Expires: 1948-05-31
Abstract
No abstract record available.
Inventors
- 👤 Eugene L Chappell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:37
CPC Classifications
C; C04; C04B; C04B40/00; C04B40/02; C04B40/0263; C04B2111/00; C04B2111/00474; C04B2111/00482; C04B2111/00525; Y; Y10; Y10S; Y10S118/00; Y10S118/10
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) | 1934-10-05 | 1935-04-06 | 1935-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-10-05 | 1939-04-06 | 1939-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-10-05 | 1943-04-06 | 1943-10-06 | $7700.00 | Window Closed / Lapsed |