US2936051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal structural unit
Assignee: Individual
•
Filing: 1957-10-18
•
Granted: 1960-05-10
•
Expires: 1977-10-18
Abstract
No abstract record available.
Inventors
- 👤 Alfred K Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:28
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/24; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/08; E04C3/30; E04C3/32; E04C3/38; E04C3/40; E04B1/2403; E04B2001/2448; E04B2001/2466; E04B2001/2469; E04B2001/2472; E04C2003/0486; E04C2003/0495
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US862973A
Cited
US948088A
Cited
US1329706A
Cited
US1788145A
Cited
GB289515A
Cited
US1785025A
Cited
GB470430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |