Patent US3403864A successfully refreshed from Google Patents.
US3403864A
Expired / Lapsed
US
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Method of producing roadrock
Assignee: Houdaille Industries Inc
•
Filing: 1966-06-08
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Granted: 1968-10-01
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Expires: 1986-06-08
Abstract
No abstract record available.
Inventors
- 👤 Russell C Cormican
- 👤 Charles B Keene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:23
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/04; C04B33/06; C04B33/30; E; E01; E01C; E01C21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1013100A
Cited
US2276333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |