US2818568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary stapling mechanism
Assignee: R W Crabtree & Sous Ltd
•
Filing: 1955-03-14
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Granted: 1958-01-07
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Expires: 1975-03-14
Abstract
No abstract record available.
Inventors
- 👤 Turrall George
- 👤 Murrell John Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:16
CPC Classifications
B; B27; B27F; B27F7/00; B27F7/17; B27F7/19; B27F7/21; B27F7/23; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833; Y10T29/49835; Y10T29/49837
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |