US2977666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making gun liner elements
Assignee: Individual
•
Filing: 1954-12-29
•
Granted: 1961-04-04
•
Expires: 1974-12-29
Abstract
No abstract record available.
Inventors
- 👤 Porter H Brace
- 👤 Jr John C Laffan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:10
CPC Classifications
F; F41; F41A; F41A21/00; F41A21/02; F41A21/04; B; B21; B21J; B21J5/00; B21J5/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US475071A
Cited
US2494935A
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US2238670A
Cited
US2499944A
Cited
US2592128A
Cited
US2628516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |