US2449407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming grinding wheels
Assignee: WALTER S MULHOLLAND
•
Filing: 1943-05-24
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Granted: 1948-09-14
•
Expires: 1963-05-24
Abstract
No abstract record available.
Inventors
- 👤 David E Mulholland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:45
CPC Classifications
B; B24; B24D; B24D18/00; B24D18/0009; B22; B22C; B22C9/00; B22C9/06; B22C9/22; B22C9/28; B29; B29C; B29C43/00; Y; Y10; Y10S; Y10S425/00; Y10S425/019
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2253792A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-14 | 1952-03-15 | 1952-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-14 | 1956-03-15 | 1956-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-14 | 1960-03-15 | 1960-09-14 | $7700.00 | Window Closed / Lapsed |