US3421776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lawnmower height adjustment apparatus
Assignee: Singer Co
•
Filing: 1966-10-05
•
Granted: 1969-01-14
•
Expires: 1986-10-05
Abstract
No abstract record available.
Inventors
- 👤 Donald P Mccoy
- 👤 Charles J Stockburger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:19
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/74; A01D2101/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US91963A
Cited
US561227A
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US2296789A
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US2878731A
Cited
US2836430A
Cited
US2915318A
Cited
US3147987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |