US2172243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of abrasive wheels
Assignee: Bay State Abrasive Products Co
•
Filing: 1938-06-16
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Granted: 1939-09-05
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Expires: 1958-06-16
Abstract
No abstract record available.
Inventors
- 👤 Roland J Goodnow
- 👤 Donald B Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:27
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; B24; B24D; B24D18/00; B24D18/0009; B29C33/00; B29C33/44; B29C33/48; B29C33/50; B29C43/00; B29C43/02; B29C43/10; B29C43/18; B30; B30B; B30B15/00; B30B15/02; B30B15/022; B30B15/024; B29C43/32; B29C43/36; B29C43/3642; B29C2043/3655; B29C37/00; B29C37/0078; B29C37/0082; B29K; B29K2105/00; B29K2105/25; B29K2105/251; B29L; B29L2031/00; B29L2031/32; B29L2031/322; Y; Y10; Y10S; Y10S425/00; Y10S425/044
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) | 1942-09-04 | 1943-03-06 | 1943-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-04 | 1947-03-06 | 1947-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-04 | 1951-03-06 | 1951-09-05 | $7700.00 | Window Closed / Lapsed |