Patent US3221728A successfully refreshed from Google Patents.
US3221728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circular saw
Assignee: Individual
•
Filing: 1963-02-19
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Granted: 1965-12-07
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Expires: 1983-02-19
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Lindblad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:19
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/02; B28D1/12; B28D1/121; B28D1/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A SAW COMPRISING A CIRCULAR DISC HAVING A REDUCED THICKNESS PERIPHERAL PORTION AND CIRCUMFERENTIALLY SPACED RECESSES AT ITS PERIPHERY THAT EXTEND INWARDLY THEREFROM, A CUTTING EDGE COMPRISING ARCUATE SEGMENTS THAT INCLUDE DIAMOND ABRASIVE PARTICLES EMBEDDED IN A MATRIX, SAID SEGMENTS SURROUNDING THE PERIPHERY OF THE DISC AND EACH HAVING A NOTCH PORTION WHICH IS A COUNTERPART OF AND FITS OVER THE REDUCED THICKNESS PERIPHERAL PORTION OF THE DISC, THE COUNTERPART SURFACES OF THE DISC AND SEGMENTS BEING OF A SHAPE TO ALIGN THE SEGMENTS ON THE DISC AND CENTER THEM BETWEEN OPPOSITE SIDES OF THE DISC, A BONDING FILM
Claim 2
Dependent Claim
99 words
A SAW COMPRISING A CIRCULAR DISC HAVING A REDUCED THICKNESS PERIPHERAL PORTION AND CIRCUMFERENTIALLY SPACED RECESSES AT ITS PERIPHERY THAT EXTEND INWARDLY THEREFROM, A CUTTING EDGE COMPRISING ARCUATE SEGMENTS THAT INCLUDE DIAMOND ABRASIVE PARTICLES EMBEDDED IN A MATRIX, SAID SEGMENTS SURROUNDING THE PERIPHERY OF THE DISC AND EACH HAVING A NOTCH PORTION WHICH IS A COUNTERPART OF AND FITS OVER THE REDUCED THICKNESS PERIPHERAL PORTION OF THE DISC, THE COUNTERPART SURFACES OF THE DISC AND SEGMENTS BEING OF A SHAPE TO ALIGN THE SEGMENTS ON THE DISC AND CENTER THEM BETWEEN OPPOSITE SIDES OF THE DISC, A BONDING FILM
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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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |