Patent US3513938A successfully refreshed from Google Patents.
US3513938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical covers for office machines
Assignee: International Business Machines Corp
•
Filing: 1969-06-02
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Granted: 1970-05-26
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Expires: 1989-06-02
Abstract
No abstract record available.
Inventors
- 👤 William L Buehner
- 👤 Donald L Greer
- 👤 Richard W Mccornack
- 👤 Paul L O'brian
- 👤 Henry W Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:58
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; B; B41; B41J; B41J29/00; B41J29/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB492502A
Cited
US2517147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |