Patent EP0305011A2 successfully refreshed from Google Patents.
US2963043A
Expired / Lapsed
US
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Pressure responsive device
Assignee: Guiberson Corp
•
Filing: 1955-08-05
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Granted: 1960-12-06
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Expires: 1975-08-05
Abstract
No abstract record available.
Inventors
- 👤 Roy C Davis
- 👤 John J Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:39
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/122; E21B43/123; F; F16; F16K; F16K41/00; F16K41/10; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2934; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49876; Y10T29/49877; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |