US2688786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible concrete form for stadiums
Assignee: RICHARD A GUMP
•
Filing: 1951-02-07
•
Granted: 1954-09-14
•
Expires: 1971-02-07
Abstract
No abstract record available.
Inventors
- 👤 Pinner Leonard Addison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:14
CPC Classifications
E; E04; E04G; E04G13/00; E04G13/06; E04G13/062
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US749735A
Cited
US1445374A
Cited
US1526401A
Cited
US1534215A
Cited
US1900301A
Cited
US2180964A
Cited
US2389397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |