US2932358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder construction and the method for making the same
Assignee: Individual
•
Filing: 1956-12-04
•
Granted: 1960-04-12
•
Expires: 1976-12-04
Abstract
No abstract record available.
Inventors
- 👤 Hopfeld Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:23
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/001; B29D99/0021; E; E06; E06C; E06C7/00; E06C7/08; B29K; B29K2105/00; B29K2105/06; B29K2711/00; B29K2711/14; B29L; B29L2031/00; B29L2031/745
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1653248A
Cited
US2738120A
Cited
US2727672A
Cited
US2788167A
Cited
US2776080A
Cited
US2855134A
Cited
US2862650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |