US3426964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor apparatus
Assignee: Dresser Industries Inc
•
Filing: 1966-10-11
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Granted: 1969-02-11
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Expires: 1986-10-11
Abstract
No abstract record available.
Inventors
- 👤 David H Silvern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:41
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/141; F01D17/143; F04; F04D; F04D27/00; F04D27/02; F04D27/0246; F04D27/0253; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/46; F04D29/462; F04D29/464; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB305214A
Cited
US2323941A
Cited
US2803396A
Cited
US2814431A
Cited
US3032259A
Cited
US2996996A
Cited
US3251539A
Cited
US3365120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |