US2987798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of hollow metal body
Assignee: BARKWAY ENGINEERING Co LT
•
Filing: 1956-08-22
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Granted: 1961-06-13
•
Expires: 1976-08-22
Abstract
No abstract record available.
Inventors
- 👤 Fromont George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:12
CPC Classifications
B; B21; B21K; B21K21/00; B21K21/04; B21K21/12; B21K23/00; B21K23/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US604137A
Cited
DE479779C
Cited
GB433829A
Cited
US2079102A
Cited
US2089912A
Cited
US2371716A
Cited
US2513739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |