Patent US2722709A successfully refreshed from Google Patents.
US2722709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
yerkes
Assignee: —
•
Filing: —
•
Granted: 1955-11-08
•
Expires: 1972-11-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:48
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/02; A47L5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US356029A
Cited
US431146A
Cited
US481054A
Cited
US481269A
Cited
US1119393A
Cited
US998517A
Cited
US1811350A
Cited
US2197918A
Cited
GB523551A
Cited
US2601697A
Cited
US2481652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |