US3527586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of fuel gas
Assignee: Wellman Incandescent Furnace Co Ltd
•
Filing: 1966-11-03
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Granted: 1970-09-08
•
Expires: 1986-11-03
Abstract
No abstract record available.
Inventors
- 👤 Cecil G Pettit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:02
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/22; C10; C10G; C10G9/00; C10G9/14; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/924
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) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |