US3540155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shot blasting device
Assignee: Individual
•
Filing: 1967-03-15
•
Granted: 1970-11-17
•
Expires: 1987-03-15
Abstract
No abstract record available.
Inventors
- 👤 Helen H Walker
- 👤 Raymond Lightsey
- 👤 William T Olin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:13
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/18; B24C3/26; B24C3/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1715711A
Cited
US631133A
Cited
US2770924A
Cited
US2752732A
Cited
US2843979A
Cited
US3286406A
Cited
US3341979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |