Patent US3508936A successfully refreshed from Google Patents.
US3508936A
Expired / Lapsed
US
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Method of making fluid self-hardening mixture,preferably for manufacturing foundry moulds and cores
Assignee: Individual
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Filing: 1968-09-27
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Granted: 1970-04-28
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Expires: 1988-09-27
Abstract
No abstract record available.
Inventors
- 👤 Abram Moiseevich Lyass
- 👤 Pavel Afanasievich Borsuk
- 👤 Lidia Dorofeevna Snulova
- 👤 Anna Ivanovna Tsyruleva
- 👤 Elena Vladimirovna Neifak
- 👤 Radzhinald Alexeevich Korotkov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:08
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/18; B22C1/186; B22C1/188; C; C04; C04B; C04B28/00; C04B28/24; C04B28/26
Claims Analysis
Total Claims: 0
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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) | 1973-04-27 | 1973-10-27 | 1974-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-27 | 1977-10-27 | 1978-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-27 | 1981-10-27 | 1982-04-28 | $7700.00 | Window Closed / Lapsed |