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Patent US1328077A successfully refreshed from Google Patents.
US1328077A
Expired / Lapsed
US
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Method of and apparatus for forming rifled bores in metal
Assignee: Ingersoll Rand Co
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Filing: 1916-10-31
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Granted: 1920-01-13
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Expires: 1936-10-31
Abstract
No abstract record available.
Inventors
- 👤 Lewis E Boyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:32
CPC Classifications
B; B21; B21J; B21J5/00; B21J5/06; B21J5/12; Y; Y10; Y10T; Y10T409/00; Y10T409/50; Y10T409/50082; Y10T409/502624; Y10T409/502788; Y10T409/502952
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1923-01-12 | 1923-07-14 | 1924-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-01-12 | 1927-07-14 | 1928-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-01-12 | 1931-07-14 | 1932-01-13 | $7700.00 | Window Closed / Lapsed |