US2561819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling jig
Assignee: PORTER MACHINE Co
•
Filing: 1947-06-24
•
Granted: 1951-07-24
•
Expires: 1967-06-24
Abstract
No abstract record available.
Inventors
- 👤 Walter J Porter
- 👤 Walter G Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:25
CPC Classifications
B; B23; B23B; B23B47/00; B23B47/28; B23B47/281; B23Q; B23Q3/00; B23Q3/16; B23B2247/00; B23B2247/12; B23B2247/18; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/561; Y10T408/5623; Y10T408/56245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US971556A
Cited
US1060477A
Cited
US1701644A
Cited
US1715380A
Cited
US1921721A
Cited
US2349142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |