US3463461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic tempering
Assignee: Dresser Industries Inc
•
Filing: 1966-03-28
•
Granted: 1969-08-26
•
Expires: 1986-03-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Kirk Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:24
CPC Classifications
G; G05; G05D; G05D22/00; G05D22/02; B; B28; B28C; B28C7/00; B28C7/04; B28C7/0404; B28C7/0409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3172175A
Cited
US3161927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |