US3471369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of char
Assignee: Suburban Mechanical Contractors Inc
•
Filing: 1968-01-08
•
Granted: 1969-10-07
•
Expires: 1988-01-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur S Cox
- 👤 John H Taggart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:26
CPC Classifications
C; C10; C10B; C10B47/00; C10B47/28; C10B47/32; C10B47/44; C10B53/00; C10B53/02; Y; Y02; Y02E; Y02E50/00; Y02E50/10; Y10; Y10S; Y10S241/00; Y10S241/38
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) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |