US2837781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window structure or assembly
Assignee: Grand Rapids Hardware Co
•
Filing: 1956-01-18
•
Granted: 1958-06-10
•
Expires: 1976-01-18
Abstract
No abstract record available.
Inventors
- 👤 Claude J Teggelaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:23
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/50; E06B3/5054; E06B3/5063; E05; E05D; E05D13/00; E05D13/10; E05D13/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2747219A
Cited
US2778069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |