Patent US2859560A successfully refreshed from Google Patents.
US2859560A
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US
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Manufacture of spherical particles
Assignee: Wald Indusries Inc
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Filing: 1956-10-02
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Granted: 1958-11-11
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Expires: 1976-10-02
Abstract
No abstract record available.
Inventors
- 👤 Jr John R Wald
- 👤 Robert B Bagshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:48
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/10; C03B19/1005; C03B19/102; C03B19/1025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1443816A
Cited
US2038251A
Cited
US2189387A
Cited
US2261425A
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US2405403A
Cited
US2538603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |