Patent US3407022A successfully refreshed from Google Patents.
US3407022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of gas flame characteristics
Assignee: South Eastern Gas Board
•
Filing: 1966-11-04
•
Granted: 1968-10-22
•
Expires: 1986-11-04
Abstract
No abstract record available.
Inventors
- 👤 Andrews Ronald William John
- 👤 Kenward John Raymond
- 👤 Dewhurst John Reginald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:31
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/0086; F; F23; F23D; F23D14/00; F23D14/46; F23D14/60
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |