Patent US3435499A successfully refreshed from Google Patents.
US3435499A
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US
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Assignee: American Shear Knife Co
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Filing: 1967-12-22
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Granted: 1969-04-01
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Expires: 1987-12-22
Abstract
No abstract record available.
Inventors
- 👤 Selwyn R Rackoff
- 👤 Martin J Dempsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:30
CPC Classifications
B; B21; B21B; B21B27/00; B21B27/02; B21B27/03; B21B27/035; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49679; Y10T29/49689; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1628835A
Cited
US2342159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |