US3533942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for loading expanded water-solution hydrate salt particles
Assignee: American Potash and Chemical Corp
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Filing: 1968-04-29
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Granted: 1970-10-13
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Expires: 1988-04-29
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Rhees
- 👤 Howard N Hammar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:06
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/687; A; A23; A23C; A23C7/00; A23C7/02; B; B01; B01J; B01J20/00; B01J20/02; B01J20/0203; B01J20/0248; B01J20/04; B01J20/22; B01J20/223; C11; C11D; C11D11/00; C11D11/0082; D; D06; D06L; D06L1/00; D06L1/02; D06L1/04; B01J2220/00; B01J2220/40; B01J2220/46; C02F2305/00; C02F2305/14; C02F5/00
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) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |