Patent US3406633A successfully refreshed from Google Patents.
US3406633A
Expired / Lapsed
US
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Collapsible chamber pump
Assignee: International Business Machines Corp
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Filing: 1966-11-07
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Granted: 1968-10-22
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Expires: 1986-11-07
Abstract
No abstract record available.
Inventors
- 👤 John F Schomburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:46
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/0009; F04B43/0054; F04B43/0072; F04B43/08; F04B43/10; F04B43/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735642A
Cited
US1696825A
Cited
US1940516A
Cited
US2786419A
Cited
US3048114A
Cited
US3194170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |