US3540258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner construction and method and apparatus for making the same and the like
Assignee: Robertshaw Controls Co
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Filing: 1968-02-05
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Granted: 1970-11-17
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Expires: 1988-02-05
Abstract
No abstract record available.
Inventors
- 👤 Charles David Branson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:57
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/02; F23D14/04; F23D14/10; F23D14/46; F23D2213/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49348; Y10T29/51; Y10T29/5176; Y10T83/00; Y10T83/04; Y10T83/0596
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) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |