US3389194A
Expired / Lapsed
US
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Method for mass producing small spherical particles
Assignee: Southwest Research Institute
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Filing: 1966-06-20
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Granted: 1968-06-18
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Expires: 1986-06-20
Abstract
No abstract record available.
Inventors
- 👤 George R Somerville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/10; C03B19/1005; C03B37/00; C03B37/01; C03B37/04; D; D01; D01D; D01D5/00; D01D5/18; D01D5/26; D04; D04H; D04H13/00
Claims Analysis
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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) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |