US3522680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanded metal facing for a lens abrading tool
Assignee: GEORGE M J SAROFEEN
•
Filing: 1967-03-23
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Granted: 1970-08-04
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Expires: 1987-03-23
Abstract
No abstract record available.
Inventors
- 👤 George M J Sarofeen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:12
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/01; Y; Y10; Y10S; Y10S451/00; Y10S451/921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |