US3436263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning large storage tanks for petroleum products
Assignee: Perolin Co Inc
•
Filing: 1965-05-13
•
Granted: 1969-04-01
•
Expires: 1985-05-13
Abstract
No abstract record available.
Inventors
- 👤 Lynn A Strenkert
- 👤 William H Carls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:53
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/08; B08B3/00; B08B3/04; B08B3/08; B08B9/093; B08B9/0936
Claims Analysis
Total Claims: 0
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US3281269A
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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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |