US3431040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Platform elevation control mechanism
Assignee: Weber Knapp Co
•
Filing: 1967-08-22
•
Granted: 1969-03-04
•
Expires: 1987-08-22
Abstract
No abstract record available.
Inventors
- 👤 Malcolm T Phelps
- 👤 Carl H Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:21
CPC Classifications
A; A47; A47B; A47B81/00; A47B81/06; A47B81/061; A47B81/064; A47B2220/00; A47B2220/0002; A47B2220/0013
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1193417A
Cited
FR30343E
Cited
US2527407A
Cited
GB742071A
Cited
US2769678A
Cited
US2790887A
Cited
US2812226A
Cited
US3080066A
Cited
US3301952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |