US1256296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of asbestos treatment and product thereof.
Assignee: Individual
•
Filing: 1917-06-28
•
Granted: 1918-02-12
•
Expires: 1937-06-28
Abstract
No abstract record available.
Inventors
- 👤 Harry Williams Charlton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:36
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01P; C01P2006/00; C01P2006/12
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) | 1921-02-11 | 1921-08-13 | 1922-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-02-11 | 1925-08-13 | 1926-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-02-11 | 1929-08-13 | 1930-02-12 | $7700.00 | Window Closed / Lapsed |