Patent US2961270A successfully refreshed from Google Patents.
US2961270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
L-beam clamp
Assignee: Individual
•
Filing: 1957-08-21
•
Granted: 1960-11-22
•
Expires: 1977-08-21
Abstract
No abstract record available.
Inventors
- 👤 Charles J Renfroe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:04
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/38; E04B1/388; F; F16; F16B; F16B2/00; F16B2/02; F16B2/06; F16B2/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US368408A
Cited
US493216A
Cited
US862840A
Cited
US1768543A
Cited
US1959722A
Cited
US2244038A
Cited
US2568263A
Cited
US2671625A
Cited
DE841894C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |