Patent US1827950A successfully refreshed from Google Patents.
US1450116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve and valve-seat facing tool
Assignee: Individual
•
Filing: 1921-02-16
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Granted: 1923-03-27
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Expires: 1941-02-16
Abstract
No abstract record available.
Inventors
- 👤 Walther C Ruhlandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:52
CPC Classifications
B; B23; B23C; B23C3/00; B23C3/02; B23C3/05; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/557; Y10T408/558; Y10T408/5587; Y10T408/89; Y10T408/899; Y10T408/905; Y10T82/00; Y10T82/29
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) | 1926-03-26 | 1926-09-25 | 1927-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-03-26 | 1930-09-25 | 1931-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-03-26 | 1934-09-25 | 1935-03-27 | $7700.00 | Window Closed / Lapsed |