US2942700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescoping tower
Assignee: ALPAR Manufacturing Co
•
Filing: 1955-05-27
•
Granted: 1960-06-28
•
Expires: 1975-05-27
Abstract
No abstract record available.
Inventors
- 👤 Charles R Parmenter
- 👤 Robert V Laustrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:47
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/18; E04H12/182; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7098
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US133017A
Cited
US2508835A
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US2612242A
Cited
US2708493A
Cited
US2589080A
Cited
US2739673A
Cited
US2740504A
Cited
US2795303A
Cited
US2808912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |