US3368010A
Expired / Lapsed
US
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Process for making hydration resistant refractory brick
Assignee: JOHN L CUMMINGS SR
•
Filing: 1965-12-27
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Granted: 1968-02-06
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Expires: 1985-12-27
Abstract
No abstract record available.
Inventors
- 👤 Sr John L Cummings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:57
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/06; C04B35/013; C04B35/04; C04B35/043; C04B35/622; C04B35/626; C04B35/628; C04B2235/00; C04B2235/02; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5427; C04B2235/5436; C04B2235/5463; C04B2235/5472; Y; Y10; Y10S; Y10S264/00; Y10S264/20
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) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |