US3321872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polishing crystals
Assignee: Union Carbide Corp
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Filing: 1964-08-03
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Granted: 1967-05-30
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Expires: 1984-08-03
Abstract
No abstract record available.
Inventors
- 👤 George A Lindstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:54
CPC Classifications
B; B24; B24B; B24B1/00; B24B9/00; B24B9/02; B24B9/06; B24B9/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS FOR POLISHING A SURFACE OF A CRYSTAL COMPRISING RUBBING SAID CRYSTAL SURFACE ONAN ALUMINUM LAPPING SURFACE COVERED WITH A FINELY DIVIDED DIAMOND ABRASIVE COMPOUND TO POLISH SAID CRYSTAL SURFACE TO A NEAR FLATNESS, AND THEREAFTER RUBBING SAID CRYSTAL SURFACE ON A TIN LAPPING SURFACE COVERED WITH A FINER DIAMOND ABRASIVE COMPOUND TO ACHIEVE A MORE NEARLY FLAT SURFACE.
Claim 2
Dependent Claim
60 words
A PROCESS FOR POLISHING A SURFACE OF A CRYSTAL COMPRISING RUBBING SAID CRYSTAL SURFACE ONAN ALUMINUM LAPPING SURFACE COVERED WITH A FINELY DIVIDED DIAMOND ABRASIVE COMPOUND TO POLISH SAID CRYSTAL SURFACE TO A NEAR FLATNESS, AND THEREAFTER RUBBING SAID CRYSTAL SURFACE ON A TIN LAPPING SURFACE COVERED WITH A FINER DIAMOND ABRASIVE COMPOUND TO ACHIEVE A MORE NEARLY FLAT SURFACE.
References Cited (Backward Citations)
US2719390A
Cited
US3177628A
Cited
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 |