US2813728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupon book
Assignee: Individual
•
Filing: 1955-03-23
•
Granted: 1957-11-19
•
Expires: 1975-03-23
Abstract
No abstract record available.
Inventors
- 👤 Harris Billups
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:10
CPC Classifications
B; B42; B42D; B42D5/00; B42D5/02; B42D5/028; B42D3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US425291A
Cited
GB189915968A
Cited
US761357A
Cited
US876078A
Cited
US1244886A
Cited
US1897024A
Cited
US2108749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |