US3322356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary crusher hammer with alternate thick and thin wear strips
Assignee: LETCO Ltd
•
Filing: 1964-06-16
•
Granted: 1967-05-30
•
Expires: 1984-06-16
Abstract
No abstract record available.
Inventors
- 👤 Leonard E Toews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:40
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/26; B02C13/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A ROTARY HAMMER HEAD COMPRISING A HEAD HAVING ALTERNATE THICK AND THIN STRIPS OF TUNGSTEN CARBIDE BRAZED TO THE FACE OF SAID HEAD, SAID HEAD HAVING ALTERNATE GROOVES FORMED IN ITS FACE TO RECEIVE THE THICKER STRIPS
Claim 2
Dependent Claim
37 words
A ROTARY HAMMER HEAD COMPRISING A HEAD HAVING ALTERNATE THICK AND THIN STRIPS OF TUNGSTEN CARBIDE BRAZED TO THE FACE OF SAID HEAD, SAID HEAD HAVING ALTERNATE GROOVES FORMED IN ITS FACE TO RECEIVE THE THICKER STRIPS
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) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |