US1481936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of applying graphite to engine pistons and cylinders
Assignee: Individual
•
Filing: 1923-03-17
•
Granted: 1924-01-29
•
Expires: 1943-03-17
Abstract
No abstract record available.
Inventors
- 👤 Thomson John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:29
CPC Classifications
F; F16; F16N; F16N15/00; F16N15/02; Y; Y10; Y10T; Y10T29/00; Y10T29/47
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1927-01-28 | 1927-07-30 | 1928-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-01-28 | 1931-07-30 | 1932-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-01-28 | 1935-07-30 | 1936-01-29 | $7700.00 | Window Closed / Lapsed |