Patent US3422580A successfully refreshed from Google Patents.
US3422580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A finishing process employing solid-gas pellets
Assignee: Roto Finish Co Inc
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Filing: 1965-10-20
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Granted: 1969-01-21
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Expires: 1985-10-20
Abstract
No abstract record available.
Inventors
- 👤 Gunther W Balz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:58
CPC Classifications
B; B24; B24B; B24B31/00; B24B31/12; B24B31/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
130 words
IN A METHOD FOR FINISHING PARTS WHICH COMPRISES SUBJECTING SAID PARTS AND A FINISHING COMPOSITION TO MOVEMENT CAUSING RELATIVE MOTION BETWEEN SAID PARTS AND SAID FINISHING COMPOSITION, AND SUBSEQUENTLY SEPARATING SAID PARTS FROM SAID FINISHING COMPOSITION, THE IMPROVEMENT WHEREIN SAID FINISHING COMPOSITION COMPRISES A PLURALITY OF PELLETS AND AN ABRASIVE MATERIAL, SAID PELLETS BEING COMPRISED OF THE SOLID PHASE OF A MATERIAL WHICH IS A GAS AT ROOM TEMPERATURE, AND WHEREIN SAID METHOD COMPRISES APPLYING EXTERNAL COOLING TO SAID PARTS AND FINISHING COMPOSITION TO MAINTAIN SAID PELLETS IN THE SOLID PHASE DURING THE FINISHING PROCESS AND, AFTER FINISHING, THE FURTHER STEP OF SUBJECTING SAID PARTS TO AT LEAST THE SUBLIMATION TEMPERATURE OF SAID SOLID GAS, WHEREBY PELLETS WHICH HAVE BECOME ENTRAPPED BY SAID PARTS DURING THE FINISHING PROCESS ARE DISENGAGED.
Claim 2
Dependent Claim
130 words
IN A METHOD FOR FINISHING PARTS WHICH COMPRISES SUBJECTING SAID PARTS AND A FINISHING COMPOSITION TO MOVEMENT CAUSING RELATIVE MOTION BETWEEN SAID PARTS AND SAID FINISHING COMPOSITION, AND SUBSEQUENTLY SEPARATING SAID PARTS FROM SAID FINISHING COMPOSITION, THE IMPROVEMENT WHEREIN SAID FINISHING COMPOSITION COMPRISES A PLURALITY OF PELLETS AND AN ABRASIVE MATERIAL, SAID PELLETS BEING COMPRISED OF THE SOLID PHASE OF A MATERIAL WHICH IS A GAS AT ROOM TEMPERATURE, AND WHEREIN SAID METHOD COMPRISES APPLYING EXTERNAL COOLING TO SAID PARTS AND FINISHING COMPOSITION TO MAINTAIN SAID PELLETS IN THE SOLID PHASE DURING THE FINISHING PROCESS AND, AFTER FINISHING, THE FURTHER STEP OF SUBJECTING SAID PARTS TO AT LEAST THE SUBLIMATION TEMPERATURE OF SAID SOLID GAS, WHEREBY PELLETS WHICH HAVE BECOME ENTRAPPED BY SAID PARTS DURING THE FINISHING PROCESS ARE DISENGAGED.
Claim 3
Dependent Claim
11 words
THE METHOD OF CLAIM 1 WHEREIN SAID GAS IS CARBON DIOXIDE.
References Cited (Backward Citations)
US2476540A
Cited
US3324605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |