US2819743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cutting rectangular openings in doors and the like
Assignee: HARDWARE PRODUCTS Corp
•
Filing: 1956-11-02
•
Granted: 1958-01-14
•
Expires: 1976-11-02
Abstract
No abstract record available.
Inventors
- 👤 Walter G Birkel
- 👤 Robert E Schram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:52
CPC Classifications
B; B27; B27F; B27F5/00; B27F5/02; B27F5/06; Y; Y10; Y10T; Y10T408/00; Y10T408/52; Y10T408/65; Y10T83/00; Y10T83/748; Y10T83/7487; Y10T83/7493; Y10T83/768; Y10T83/7684; Y10T83/7722; Y10T83/7726; Y10T83/929; Y10T83/9372; Y10T83/9403; Y10T83/9457; Y10T83/9464
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US428722A
Cited
US834206A
Cited
US988039A
Cited
US939438A
Cited
US2349133A
Cited
US2645255A
Cited
US2508784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |