US4655847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning method
Assignee: Doryokuro Kakunenryo Kaihatsu Jigyodan
•
Filing: 1984-07-17
•
Granted: 1987-04-07
•
Expires: 2004-07-17
Abstract
Abstract Dry-ice particles are blasted against an object to be cleaned under the presence of ice particles, whereby drawbacks in the case of blasting the dry-ice particles alone can be eliminated.
Inventors
- 👤 Tsuyoshi Ichinoseki
- 👤 Hirobumi Kato
- 👤 Shuji Miyahara
- 👤 Harumi Kimuro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:26
CPC Classifications
B; B24; B24C; B24C7/00; B24C7/0092; B24C1/00; B24C1/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A cleaning method comprising: blasting a mixture of abrasive dry-ice particles and abrasive ice particles against an object to be cleaned.
Claim 2
Dependent Claim
21 words
A cleaning method comprising: blasting a mixture of abrasive dry-ice particles and abrasive ice particles against an object to be cleaned.
References Cited (Backward Citations)
SU197801A1
Cited
US2858653A
Cited
US3676963A
Cited
GB1397102A
Cited
US3894364A
Cited
US4125969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |