Patent US2986797A successfully refreshed from Google Patents.
US2986797A
Expired / Lapsed
US
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Mold for preparation of artificial stone test cylinders
Assignee: Individual
•
Filing: 1957-07-12
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Granted: 1961-06-06
•
Expires: 1977-07-12
Abstract
No abstract record available.
Inventors
- 👤 Irwin M Aisenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:20
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/34; B28B7/348; B28B7/0094; B28B7/28; Y; Y10; Y10S; Y10S249/00; Y10S249/04; Y10S425/00; Y10S425/044
Claims Analysis
Total Claims: 0
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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) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |