US2856623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor waxer
Assignee: Individual
•
Filing: 1956-05-28
•
Granted: 1958-10-21
•
Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 Robert F Darlington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:25
CPC Classifications
A; A47; A47L; A47L13/00; A47L13/10; A47L13/28; A47L13/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE21520C
Cited
US735638A
Cited
US1112094A
Cited
US1752581A
Cited
US1773894A
Cited
AU1659228A
Cited
CH134894A
Cited
US2736914A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |