US3465412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll-weld cylinder fabrication
Assignee: McDonnell Douglas Corp
•
Filing: 1966-02-21
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Granted: 1969-09-09
•
Expires: 1986-02-21
Abstract
No abstract record available.
Inventors
- 👤 Preston L Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:02
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1393564A
Cited
US2059584A
Cited
US2851770A
Cited
US2988809A
Cited
US3044160A
Cited
US3186083A
Cited
US3321826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-08 | 1973-03-10 | 1973-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-08 | 1977-03-10 | 1977-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-08 | 1981-03-10 | 1981-09-09 | $7700.00 | Window Closed / Lapsed |