Patent US4793350A successfully refreshed from Google Patents.
US2934446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collagen fiber masses and methods of making the same
Assignee: United Shoe Machinery Corp
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Filing: 1955-12-21
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Granted: 1960-04-26
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Expires: 1975-12-21
Abstract
No abstract record available.
Inventors
- 👤 John H Highberger
- 👤 Robert A Whitmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:36
CPC Classifications
C; C08; C08L; C08L89/00; C08L89/04; C08L89/06; D; D06; D06N; D06N3/00; D06N3/12; Y; Y10; Y10S; Y10S128/00; Y10S128/08; Y10S530/00; Y10S530/827; Y10S530/842
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
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
Claim 2
Independent Claim
139 words
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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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |