Patent US5117476A successfully refreshed from Google Patents.
US3336737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary lawn mower blade
Assignee: Individual
•
Filing: 1963-10-21
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Granted: 1967-08-22
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Expires: 1983-10-21
Abstract
No abstract record available.
Inventors
- 👤 Belfiore Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:08
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/73; A01D34/82; A01D34/828; A01D2101/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A ROTARY LAWN MOWER BLADE COMPRISING A DISC HAVING OPPOSITELY DISPOSED FACES, A PERIPHERAL EDGE, AND MEANS DEFINING A SUBSTANTIALLY CENTRAL OPENING FOR RECEPTION OF THE ROTATABLE SHAFT OF A LAWN MOWER, GRASS CUTTING MEANS DEFINED IN SAID DISC INTERMEDIATE SAID PERIPHERAL EDGE AND SAID CENTRAL OPENING, SAID GRASS CUTTING MEANS INCLUDING AT LEAST ONE CUTTING ELEMENT SPACED AXIALLY FROM ONE OF SAID FACES OF SAID DISC, AND AN ANNULAR BEAD EXTENDING AROUND AT LEAST A PORTION OF SAID PERIPHERAL EDGE OF SAID DISC, SAID ANNULAR BEAD INCLUDING PROTECTIVE PORTIONS SPACED AXIALLY A GREATER DISTANCE FROM SAID FACE OF SAID DISC THAN SAID CUTTING ELEMENT.
Claim 2
Dependent Claim
105 words
A ROTARY LAWN MOWER BLADE COMPRISING A DISC HAVING OPPOSITELY DISPOSED FACES, A PERIPHERAL EDGE, AND MEANS DEFINING A SUBSTANTIALLY CENTRAL OPENING FOR RECEPTION OF THE ROTATABLE SHAFT OF A LAWN MOWER, GRASS CUTTING MEANS DEFINED IN SAID DISC INTERMEDIATE SAID PERIPHERAL EDGE AND SAID CENTRAL OPENING, SAID GRASS CUTTING MEANS INCLUDING AT LEAST ONE CUTTING ELEMENT SPACED AXIALLY FROM ONE OF SAID FACES OF SAID DISC, AND AN ANNULAR BEAD EXTENDING AROUND AT LEAST A PORTION OF SAID PERIPHERAL EDGE OF SAID DISC, SAID ANNULAR BEAD INCLUDING PROTECTIVE PORTIONS SPACED AXIALLY A GREATER DISTANCE FROM SAID FACE OF SAID DISC THAN SAID CUTTING ELEMENT.
References Cited (Backward Citations)
US3097469A
Cited
US1964290A
Cited
US2920436A
Cited
US2869311A
Cited
US3096603A
Cited
US3059400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |