Patent US2734812A successfully refreshed from Google Patents.
US2734812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
robie
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:12
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/342; B24D3/344; B24D3/348
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
AN ABRASIVE ARTICLE COMPOSED PRINCIPALLY OF ABRASIVE GRANULES AND A PHENOLIC RESIN BOND THEREFOR, SAID ARTICLE COMPRISING ALSO FROM 1 TO 5% BY WEIGHT OF BRITTLE, RIGID POROUS GRANULES CONTAINING IN EXCESS OF 50% BY VOLUME OF PORE SPACE, SAID GRANULES BEING SELECTED FROM THE GROUP CONSISTING OF EXPANDED PERLITE, FOAM GLASS AND EXPANDED PLASTICS.
Claim 2
Dependent Claim
55 words
AN ABRASIVE ARTICLE COMPOSED PRINCIPALLY OF ABRASIVE GRANULES AND A PHENOLIC RESIN BOND THEREFOR, SAID ARTICLE COMPRISING ALSO FROM 1 TO 5% BY WEIGHT OF BRITTLE, RIGID POROUS GRANULES CONTAINING IN EXCESS OF 50% BY VOLUME OF PORE SPACE, SAID GRANULES BEING SELECTED FROM THE GROUP CONSISTING OF EXPANDED PERLITE, FOAM GLASS AND EXPANDED PLASTICS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |