Patent US3344526A successfully refreshed from Google Patents.
Patent US3526285A successfully refreshed from Google Patents.
US3526285A
Expired / Lapsed
US
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Angularly adjustable auger head
Assignee: American Gas Association Inc
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Filing: 1968-11-05
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Granted: 1970-09-01
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Expires: 1988-11-05
Abstract
No abstract record available.
Inventors
- 👤 David E Adkins
- 👤 Ronald L Legue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:57
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/06; E21B7/062; E21B7/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2119095A
Cited
US2581667A
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US2675213A
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US3354969A
Cited
US3326008A
Cited
US3330368A
Cited
US3375885A
Cited
US3402781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-31 | 1974-03-02 | 1974-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-31 | 1978-03-02 | 1978-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-31 | 1982-03-02 | 1982-09-01 | $7700.00 | Window Closed / Lapsed |