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US3381387A
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Assignee: JAMES A LANDRUM JR
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Filing: 1966-03-16
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Granted: 1968-05-07
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Expires: 1986-03-16
Abstract
No abstract record available.
Inventors
- 👤 Jr James A Landrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:08
CPC Classifications
B; B23; B23B; B23B47/00; B23B47/28; B23B47/287; B23B2260/00; B23B2260/088; Y; Y10; Y10T; Y10T408/00; Y10T408/96; Y10T408/97
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US328699A
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US2341875A
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US2447932A
Cited
US2437847A
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US2591814A
Cited
US2607990A
Cited
US3210855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |