Patent US2865725A successfully refreshed from Google Patents.
US2865725A
Expired / Lapsed
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Polishing article
Assignee: ECON-O-CLOTH Inc
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Filing: 1956-06-18
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Granted: 1958-12-23
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Expires: 1976-06-18
Abstract
No abstract record available.
Inventors
- 👤 Gertrude D Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:41
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/1454; C09K3/1472
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A LENS POLISHING ARTICLE CONSISTING ESSENTIALLY OF A COTTON FABRIC OF ABOUT 0.2 MILLIMETER THICKNESS COATED WITH AN ABRASIVE SUBSTANCE CONSISTING ESSENTIALLY OF A RATIO OF ABOUT 20 PARTS BY WEIGHT OF CELLULOSE NITRATE HAVING A NITROGEN CONTENT OF FROM ABOUT 11.8-12.2% PER ABOUT 10 PARTS OF CERIUM OXIDE.
Claim 2
Dependent Claim
49 words
A LENS POLISHING ARTICLE CONSISTING ESSENTIALLY OF A COTTON FABRIC OF ABOUT 0.2 MILLIMETER THICKNESS COATED WITH AN ABRASIVE SUBSTANCE CONSISTING ESSENTIALLY OF A RATIO OF ABOUT 20 PARTS BY WEIGHT OF CELLULOSE NITRATE HAVING A NITROGEN CONTENT OF FROM ABOUT 11.8-12.2% PER ABOUT 10 PARTS OF CERIUM OXIDE.
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US1629259A
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US2024303A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |