US2730028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turf perforator
Assignee: Individual
•
Filing: 1951-02-20
•
Granted: 1956-01-10
•
Expires: 1971-02-20
Abstract
No abstract record available.
Inventors
- 👤 Harry L Oswalt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:18
CPC Classifications
A; A01; A01B; A01B45/00; A01B45/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20663E
Cited
GB441228A
Cited
US2068828A
Cited
US2641982A
Cited
US2517733A
Cited
US2613582A
Cited
US2601752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |