US3076509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cementing head
Assignee: Individual
•
Filing: 1958-05-26
•
Granted: 1963-02-05
•
Expires: 1978-05-26
Abstract
No abstract record available.
Inventors
- 👤 Burns Erwin
- 👤 Peter J Fiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:29
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/05; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86638; Y10T137/86646
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US277695A
Cited
US473839A
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US881711A
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US1446547A
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US2481422A
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US2662602A
Cited
US2615519A
Cited
US2687046A
Cited
US2698582A
Cited
US2713909A
Cited
US2725121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |